private String getBestTag(String word) {
double bestScore = Double.NEGATIVE_INFINITY;
String bestTag = null;
for (String tag : lexicon.getAllTags()) {
double score = lexicon.scoreTagging(word, tag);
if (bestTag == null || score > bestScore) {
bestScore = score;
bestTag = tag;
}
}
return bestTag;
}
/**
* @param previousGrammar
* @param previousLexicon
* @param grammar
* @param lexicon
* @param trainStateSetTrees
* @return
*/
public static double doOneEStep(
Grammar previousGrammar,
Lexicon previousLexicon,
Grammar grammar,
Lexicon lexicon,
StateSetTreeList trainStateSetTrees,
boolean updateOnlyLexicon,
int unkThreshold) {
boolean secondHalf = false;
ArrayParser parser = new ArrayParser(previousGrammar, previousLexicon);
double trainingLikelihood = 0;
int n = 0;
int nTrees = trainStateSetTrees.size();
for (Tree<StateSet> stateSetTree : trainStateSetTrees) {
secondHalf = (n++ > nTrees / 2.0);
boolean noSmoothing = true, debugOutput = false;
parser.doInsideOutsideScores(stateSetTree, noSmoothing, debugOutput); // E Step
double ll = stateSetTree.getLabel().getIScore(0);
ll =
Math.log(ll)
+ (100 * stateSetTree.getLabel().getIScale()); // System.out.println(stateSetTree);
if ((Double.isInfinite(ll) || Double.isNaN(ll))) {
if (VERBOSE) {
System.out.println("Training sentence " + n + " is given " + ll + " log likelihood!");
System.out.println(
"Root iScore "
+ stateSetTree.getLabel().getIScore(0)
+ " scale "
+ stateSetTree.getLabel().getIScale());
}
} else {
lexicon.trainTree(stateSetTree, -1, previousLexicon, secondHalf, noSmoothing, unkThreshold);
if (!updateOnlyLexicon) grammar.tallyStateSetTree(stateSetTree, previousGrammar); // E Step
trainingLikelihood += ll; // there are for some reason some sentences that are unparsable
}
}
lexicon.tieRareWordStats(unkThreshold);
// SSIE
((SophisticatedLexicon) lexicon).overwriteWithMaxent();
return trainingLikelihood;
}
public static void main(String[] args) {
OptionParser optParser = new OptionParser(Options.class);
Options opts = (Options) optParser.parse(args, true);
// provide feedback on command-line arguments
System.out.println("Calling with " + optParser.getPassedInOptions());
String path = opts.path;
// int lang = opts.lang;
System.out.println("Loading trees from " + path + " and using language " + opts.treebank);
double trainingFractionToKeep = opts.trainingFractionToKeep;
int maxSentenceLength = opts.maxSentenceLength;
System.out.println("Will remove sentences with more than " + maxSentenceLength + " words.");
HORIZONTAL_MARKOVIZATION = opts.horizontalMarkovization;
VERTICAL_MARKOVIZATION = opts.verticalMarkovization;
System.out.println(
"Using horizontal="
+ HORIZONTAL_MARKOVIZATION
+ " and vertical="
+ VERTICAL_MARKOVIZATION
+ " markovization.");
Binarization binarization = opts.binarization;
System.out.println(
"Using " + binarization.name() + " binarization."); // and "+annotateString+".");
double randomness = opts.randomization;
System.out.println("Using a randomness value of " + randomness);
String outFileName = opts.outFileName;
if (outFileName == null) {
System.out.println("Output File name is required.");
System.exit(-1);
} else System.out.println("Using grammar output file " + outFileName + ".");
VERBOSE = opts.verbose;
RANDOM = new Random(opts.randSeed);
System.out.println("Random number generator seeded at " + opts.randSeed + ".");
boolean manualAnnotation = false;
boolean baseline = opts.baseline;
boolean noSplit = opts.noSplit;
int numSplitTimes = opts.numSplits;
if (baseline) numSplitTimes = 0;
String splitGrammarFile = opts.inFile;
int allowedDroppingIters = opts.di;
int maxIterations = opts.splitMaxIterations;
int minIterations = opts.splitMinIterations;
if (minIterations > 0)
System.out.println("I will do at least " + minIterations + " iterations.");
double[] smoothParams = {opts.smoothingParameter1, opts.smoothingParameter2};
System.out.println("Using smoothing parameters " + smoothParams[0] + " and " + smoothParams[1]);
boolean allowMoreSubstatesThanCounts = false;
boolean findClosedUnaryPaths = opts.findClosedUnaryPaths;
Corpus corpus =
new Corpus(
path,
opts.treebank,
trainingFractionToKeep,
false,
opts.skipSection,
opts.skipBilingual);
List<Tree<String>> trainTrees =
Corpus.binarizeAndFilterTrees(
corpus.getTrainTrees(),
VERTICAL_MARKOVIZATION,
HORIZONTAL_MARKOVIZATION,
maxSentenceLength,
binarization,
manualAnnotation,
VERBOSE);
List<Tree<String>> validationTrees =
Corpus.binarizeAndFilterTrees(
corpus.getValidationTrees(),
VERTICAL_MARKOVIZATION,
HORIZONTAL_MARKOVIZATION,
maxSentenceLength,
binarization,
manualAnnotation,
VERBOSE);
Numberer tagNumberer = Numberer.getGlobalNumberer("tags");
// for (Tree<String> t : trainTrees){
// System.out.println(t);
// }
if (opts.trainOnDevSet) {
System.out.println("Adding devSet to training data.");
trainTrees.addAll(validationTrees);
}
if (opts.lowercase) {
System.out.println("Lowercasing the treebank.");
Corpus.lowercaseWords(trainTrees);
Corpus.lowercaseWords(validationTrees);
}
int nTrees = trainTrees.size();
System.out.println("There are " + nTrees + " trees in the training set.");
double filter = opts.filter;
if (filter > 0)
System.out.println(
"Will remove rules with prob under "
+ filter
+ ".\nEven though only unlikely rules are pruned the training LL is not guaranteed to increase in every round anymore "
+ "(especially when we are close to converging)."
+ "\nFurthermore it increases the variance because 'good' rules can be pruned away in early stages.");
short nSubstates = opts.nSubStates;
short[] numSubStatesArray =
initializeSubStateArray(trainTrees, validationTrees, tagNumberer, nSubstates);
if (baseline) {
short one = 1;
Arrays.fill(numSubStatesArray, one);
System.out.println("Training just the baseline grammar (1 substate for all states)");
randomness = 0.0f;
}
if (VERBOSE) {
for (int i = 0; i < numSubStatesArray.length; i++) {
System.out.println("Tag " + (String) tagNumberer.object(i) + " " + i);
}
}
System.out.println("There are " + numSubStatesArray.length + " observed categories.");
// initialize lexicon and grammar
Lexicon lexicon = null, maxLexicon = null, previousLexicon = null;
Grammar grammar = null, maxGrammar = null, previousGrammar = null;
double maxLikelihood = Double.NEGATIVE_INFINITY;
// String smootherStr = opts.smooth;
// Smoother lexiconSmoother = null;
// Smoother grammarSmoother = null;
// if (splitGrammarFile!=null){
// lexiconSmoother = maxLexicon.smoother;
// grammarSmoother = maxGrammar.smoother;
// System.out.println("Using smoother from input grammar.");
// }
// else if (smootherStr.equals("NoSmoothing"))
// lexiconSmoother = grammarSmoother = new NoSmoothing();
// else if (smootherStr.equals("SmoothAcrossParentBits")) {
// lexiconSmoother = grammarSmoother = new SmoothAcrossParentBits(grammarSmoothing,
// maxGrammar.splitTrees);
// }
// else
// throw new Error("I didn't understand the type of smoother '"+smootherStr+"'");
// System.out.println("Using smoother "+smootherStr);
// EM: iterate until the validation likelihood drops for four consecutive
// iterations
int iter = 0;
int droppingIter = 0;
// If we are splitting, we load the old grammar and start off by splitting.
int startSplit = 0;
if (splitGrammarFile != null) {
System.out.println("Loading old grammar from " + splitGrammarFile);
startSplit = 1; // we've already trained the grammar
ParserData pData = ParserData.Load(splitGrammarFile);
maxGrammar = pData.gr;
maxLexicon = pData.lex;
numSubStatesArray = maxGrammar.numSubStates;
previousGrammar = grammar = maxGrammar;
previousLexicon = lexicon = maxLexicon;
Numberer.setNumberers(pData.getNumbs());
tagNumberer = Numberer.getGlobalNumberer("tags");
System.out.println("Loading old grammar complete.");
if (noSplit) {
System.out.println("Will NOT split the loaded grammar.");
startSplit = 0;
}
}
double mergingPercentage = opts.mergingPercentage;
boolean separateMergingThreshold = opts.separateMergingThreshold;
if (mergingPercentage > 0) {
System.out.println(
"Will merge " + (int) (mergingPercentage * 100) + "% of the splits in each round.");
System.out.println(
"The threshold for merging lexical and phrasal categories will be set separately: "
+ separateMergingThreshold);
}
StateSetTreeList trainStateSetTrees =
new StateSetTreeList(trainTrees, numSubStatesArray, false, tagNumberer);
StateSetTreeList validationStateSetTrees =
new StateSetTreeList(validationTrees, numSubStatesArray, false, tagNumberer); // deletePC);
// get rid of the old trees
trainTrees = null;
validationTrees = null;
corpus = null;
System.gc();
if (opts.simpleLexicon) {
System.out.println(
"Replacing words which have been seen less than 5 times with their signature.");
Corpus.replaceRareWords(
trainStateSetTrees, new SimpleLexicon(numSubStatesArray, -1), opts.rare);
}
// If we're training without loading a split grammar, then we run once without splitting.
if (splitGrammarFile == null) {
grammar =
new Grammar(numSubStatesArray, findClosedUnaryPaths, new NoSmoothing(), null, filter);
Lexicon tmp_lexicon =
(opts.simpleLexicon)
? new SimpleLexicon(
numSubStatesArray,
-1,
smoothParams,
new NoSmoothing(),
filter,
trainStateSetTrees)
: new SophisticatedLexicon(
numSubStatesArray,
SophisticatedLexicon.DEFAULT_SMOOTHING_CUTOFF,
smoothParams,
new NoSmoothing(),
filter);
int n = 0;
boolean secondHalf = false;
for (Tree<StateSet> stateSetTree : trainStateSetTrees) {
secondHalf = (n++ > nTrees / 2.0);
tmp_lexicon.trainTree(stateSetTree, randomness, null, secondHalf, false, opts.rare);
}
lexicon =
(opts.simpleLexicon)
? new SimpleLexicon(
numSubStatesArray,
-1,
smoothParams,
new NoSmoothing(),
filter,
trainStateSetTrees)
: new SophisticatedLexicon(
numSubStatesArray,
SophisticatedLexicon.DEFAULT_SMOOTHING_CUTOFF,
smoothParams,
new NoSmoothing(),
filter);
for (Tree<StateSet> stateSetTree : trainStateSetTrees) {
secondHalf = (n++ > nTrees / 2.0);
lexicon.trainTree(stateSetTree, randomness, tmp_lexicon, secondHalf, false, opts.rare);
grammar.tallyUninitializedStateSetTree(stateSetTree);
}
lexicon.tieRareWordStats(opts.rare);
lexicon.optimize();
// SSIE
((SophisticatedLexicon) lexicon).overwriteWithMaxent();
grammar.optimize(randomness);
// System.out.println(grammar);
previousGrammar = maxGrammar = grammar; // needed for baseline - when there is no EM loop
previousLexicon = maxLexicon = lexicon;
}
// the main loop: split and train the grammar
for (int splitIndex = startSplit; splitIndex < numSplitTimes * 3; splitIndex++) {
// now do either a merge or a split and the end a smooth
// on odd iterations merge, on even iterations split
String opString = "";
if (splitIndex % 3 == 2) { // (splitIndex==numSplitTimes*2){
if (opts.smooth.equals("NoSmoothing")) continue;
System.out.println("Setting smoother for grammar and lexicon.");
Smoother grSmoother = new SmoothAcrossParentBits(0.01, maxGrammar.splitTrees);
Smoother lexSmoother = new SmoothAcrossParentBits(0.1, maxGrammar.splitTrees);
// Smoother grSmoother = new SmoothAcrossParentSubstate(0.01);
// Smoother lexSmoother = new SmoothAcrossParentSubstate(0.1);
maxGrammar.setSmoother(grSmoother);
maxLexicon.setSmoother(lexSmoother);
minIterations = maxIterations = opts.smoothMaxIterations;
opString = "smoothing";
} else if (splitIndex % 3 == 0) {
// the case where we split
if (opts.noSplit) continue;
System.out.println(
"Before splitting, we have a total of " + maxGrammar.totalSubStates() + " substates.");
CorpusStatistics corpusStatistics = new CorpusStatistics(tagNumberer, trainStateSetTrees);
int[] counts = corpusStatistics.getSymbolCounts();
maxGrammar = maxGrammar.splitAllStates(randomness, counts, allowMoreSubstatesThanCounts, 0);
maxLexicon = maxLexicon.splitAllStates(counts, allowMoreSubstatesThanCounts, 0);
Smoother grSmoother = new NoSmoothing();
Smoother lexSmoother = new NoSmoothing();
maxGrammar.setSmoother(grSmoother);
maxLexicon.setSmoother(lexSmoother);
System.out.println(
"After splitting, we have a total of " + maxGrammar.totalSubStates() + " substates.");
System.out.println(
"Rule probabilities are NOT normalized in the split, therefore the training LL is not guaranteed to improve between iteration 0 and 1!");
opString = "splitting";
maxIterations = opts.splitMaxIterations;
minIterations = opts.splitMinIterations;
} else {
if (mergingPercentage == 0) continue;
// the case where we merge
double[][] mergeWeights =
GrammarMerger.computeMergeWeights(maxGrammar, maxLexicon, trainStateSetTrees);
double[][][] deltas =
GrammarMerger.computeDeltas(maxGrammar, maxLexicon, mergeWeights, trainStateSetTrees);
boolean[][][] mergeThesePairs =
GrammarMerger.determineMergePairs(
deltas, separateMergingThreshold, mergingPercentage, maxGrammar);
grammar = GrammarMerger.doTheMerges(maxGrammar, maxLexicon, mergeThesePairs, mergeWeights);
short[] newNumSubStatesArray = grammar.numSubStates;
trainStateSetTrees = new StateSetTreeList(trainStateSetTrees, newNumSubStatesArray, false);
validationStateSetTrees =
new StateSetTreeList(validationStateSetTrees, newNumSubStatesArray, false);
// retrain lexicon to finish the lexicon merge (updates the unknown words model)...
lexicon =
(opts.simpleLexicon)
? new SimpleLexicon(
newNumSubStatesArray,
-1,
smoothParams,
maxLexicon.getSmoother(),
filter,
trainStateSetTrees)
: new SophisticatedLexicon(
newNumSubStatesArray,
SophisticatedLexicon.DEFAULT_SMOOTHING_CUTOFF,
maxLexicon.getSmoothingParams(),
maxLexicon.getSmoother(),
maxLexicon.getPruningThreshold());
boolean updateOnlyLexicon = true;
double trainingLikelihood =
GrammarTrainer.doOneEStep(
grammar,
maxLexicon,
null,
lexicon,
trainStateSetTrees,
updateOnlyLexicon,
opts.rare);
// System.out.println("The training LL is "+trainingLikelihood);
lexicon
.optimize(); // Grammar.RandomInitializationType.INITIALIZE_WITH_SMALL_RANDOMIZATION);
// // M Step
GrammarMerger.printMergingStatistics(maxGrammar, grammar);
opString = "merging";
maxGrammar = grammar;
maxLexicon = lexicon;
maxIterations = opts.mergeMaxIterations;
minIterations = opts.mergeMinIterations;
}
// update the substate dependent objects
previousGrammar = grammar = maxGrammar;
previousLexicon = lexicon = maxLexicon;
droppingIter = 0;
numSubStatesArray = grammar.numSubStates;
trainStateSetTrees = new StateSetTreeList(trainStateSetTrees, numSubStatesArray, false);
validationStateSetTrees =
new StateSetTreeList(validationStateSetTrees, numSubStatesArray, false);
maxLikelihood = calculateLogLikelihood(maxGrammar, maxLexicon, validationStateSetTrees);
System.out.println(
"After "
+ opString
+ " in the "
+ (splitIndex / 3 + 1)
+ "th round, we get a validation likelihood of "
+ maxLikelihood);
iter = 0;
// the inner loop: train the grammar via EM until validation likelihood reliably drops
do {
iter += 1;
System.out.println("Beginning iteration " + (iter - 1) + ":");
// 1) Compute the validation likelihood of the previous iteration
System.out.print("Calculating validation likelihood...");
double validationLikelihood =
calculateLogLikelihood(
previousGrammar,
previousLexicon,
validationStateSetTrees); // The validation LL of previousGrammar/previousLexicon
System.out.println("done: " + validationLikelihood);
// 2) Perform the E step while computing the training likelihood of the previous iteration
System.out.print("Calculating training likelihood...");
grammar =
new Grammar(
grammar.numSubStates,
grammar.findClosedPaths,
grammar.smoother,
grammar,
grammar.threshold);
lexicon =
(opts.simpleLexicon)
? new SimpleLexicon(
grammar.numSubStates,
-1,
smoothParams,
lexicon.getSmoother(),
filter,
trainStateSetTrees)
: new SophisticatedLexicon(
grammar.numSubStates,
SophisticatedLexicon.DEFAULT_SMOOTHING_CUTOFF,
lexicon.getSmoothingParams(),
lexicon.getSmoother(),
lexicon.getPruningThreshold());
boolean updateOnlyLexicon = false;
double trainingLikelihood =
doOneEStep(
previousGrammar,
previousLexicon,
grammar,
lexicon,
trainStateSetTrees,
updateOnlyLexicon,
opts.rare); // The training LL of previousGrammar/previousLexicon
System.out.println("done: " + trainingLikelihood);
// 3) Perform the M-Step
lexicon.optimize(); // M Step
grammar.optimize(0); // M Step
// 4) Check whether previousGrammar/previousLexicon was in fact better than the best
if (iter < minIterations || validationLikelihood >= maxLikelihood) {
maxLikelihood = validationLikelihood;
maxGrammar = previousGrammar;
maxLexicon = previousLexicon;
droppingIter = 0;
} else {
droppingIter++;
}
// 5) advance the 'pointers'
previousGrammar = grammar;
previousLexicon = lexicon;
} while ((droppingIter < allowedDroppingIters) && (!baseline) && (iter < maxIterations));
// Dump a grammar file to disk from time to time
ParserData pData =
new ParserData(
maxLexicon,
maxGrammar,
null,
Numberer.getNumberers(),
numSubStatesArray,
VERTICAL_MARKOVIZATION,
HORIZONTAL_MARKOVIZATION,
binarization);
String outTmpName = outFileName + "_" + (splitIndex / 3 + 1) + "_" + opString + ".gr";
System.out.println("Saving grammar to " + outTmpName + ".");
if (pData.Save(outTmpName)) System.out.println("Saving successful.");
else System.out.println("Saving failed!");
pData = null;
}
// The last grammar/lexicon has not yet been evaluated. Even though the validation likelihood
// has been dropping in the past few iteration, there is still a chance that the last one was in
// fact the best so just in case we evaluate it.
System.out.print("Calculating last validation likelihood...");
double validationLikelihood = calculateLogLikelihood(grammar, lexicon, validationStateSetTrees);
System.out.println(
"done.\n Iteration "
+ iter
+ " (final) gives validation likelihood "
+ validationLikelihood);
if (validationLikelihood > maxLikelihood) {
maxLikelihood = validationLikelihood;
maxGrammar = previousGrammar;
maxLexicon = previousLexicon;
}
ParserData pData =
new ParserData(
maxLexicon,
maxGrammar,
null,
Numberer.getNumberers(),
numSubStatesArray,
VERTICAL_MARKOVIZATION,
HORIZONTAL_MARKOVIZATION,
binarization);
System.out.println("Saving grammar to " + outFileName + ".");
System.out.println("It gives a validation data log likelihood of: " + maxLikelihood);
if (pData.Save(outFileName)) System.out.println("Saving successful.");
else System.out.println("Saving failed!");
System.exit(0);
}
public Tree<String> getBestParse(List<String> sentence) {
// TODO: implement this method
int n = sentence.size();
// System.out.println("getBestParse: n=" + n);
List<List<Map<Object, Double>>> scores = new ArrayList<List<Map<Object, Double>>>(n + 1);
for (int i = 0; i < n + 1; i++) {
List<Map<Object, Double>> row = new ArrayList<Map<Object, Double>>(n + 1);
for (int j = 0; j < n + 1; j++) {
row.add(new HashMap<Object, Double>());
}
scores.add(row);
}
List<List<Map<Object, Triplet<Integer, Object, Object>>>> backs =
new ArrayList<List<Map<Object, Triplet<Integer, Object, Object>>>>(n + 1);
for (int i = 0; i < n + 1; i++) {
List<Map<Object, Triplet<Integer, Object, Object>>> row =
new ArrayList<Map<Object, Triplet<Integer, Object, Object>>>(n + 1);
for (int j = 0; j < n + 1; j++) {
row.add(new HashMap<Object, Triplet<Integer, Object, Object>>());
}
backs.add(row);
}
/*
System.out.println("scores=" + scores.size() + "x" + scores.get(0).size());
System.out.println("backs=" + backs.size() + "x" + backs.get(0).size());
printChart(scores, backs, "scores");
*/
// First the Lexicon
for (int i = 0; i < n; i++) {
String word = sentence.get(i);
for (String tag : lexicon.getAllTags()) {
UnaryRule A = new UnaryRule(tag, word);
A.setScore(Math.log(lexicon.scoreTagging(word, tag)));
scores.get(i).get(i + 1).put(A, A.getScore());
backs.get(i).get(i + 1).put(A, null);
}
// System.out.println("Starting unaries: i=" + i + ",n=" + n );
// Handle unaries
boolean added = true;
while (added) {
added = false;
Map<Object, Double> A_scores = scores.get(i).get(i + 1);
// Don't modify the dict we are iterating
List<Object> A_keys = copyKeys(A_scores);
// for (int j = 0; j < 5 && j < A_keys.size(); j++) {
// System.out.print("," + j + "=" + A_scores.get(A_keys.get(j)));
// }
for (Object oB : A_keys) {
UnaryRule B = (UnaryRule) oB;
for (UnaryRule A : grammar.getUnaryRulesByChild(B.getParent())) {
double prob = Math.log(A.getScore()) + A_scores.get(B);
if (prob > -1000.0) {
if (!A_scores.containsKey(A) || prob > A_scores.get(A)) {
// System.out.print(" *A=" + A + ", B=" + B);
// System.out.print(", prob=" + prob);
// System.out.println(", A_scores.get(A)=" + A_scores.get(A));
A_scores.put(A, prob);
backs.get(i).get(i + 1).put(A, new Triplet<Integer, Object, Object>(-1, B, null));
added = true;
}
// System.out.println(", added=" + added);
}
}
}
// System.out.println(", A_scores=" + A_scores.size() + ", added=" + added);
}
}
// printChart(scores, backs, "scores with Lexicon");
// Do higher layers
// Naming is based on rules: A -> B,C
long startTime = new Date().getTime();
for (int span = 2; span < n + 1; span++) {
for (int begin = 0; begin < n + 1 - span; begin++) {
int end = begin + span;
Map<Object, Double> A_scores = scores.get(begin).get(end);
Map<Object, Triplet<Integer, Object, Object>> A_backs = backs.get(begin).get(end);
for (int split = begin + 1; split < end; split++) {
Map<Object, Double> B_scores = scores.get(begin).get(split);
Map<Object, Double> C_scores = scores.get(split).get(end);
List<Object> B_list = new ArrayList<Object>(B_scores.keySet());
List<Object> C_list = new ArrayList<Object>(C_scores.keySet());
// This is a key optimization. !@#$
// It avoids a B_list.size() x C_list.size() search in the for (Object B : B_list) loop
Map<String, List<Object>> C_map = new HashMap<String, List<Object>>();
for (Object C : C_list) {
String parent = getParent(C);
if (!C_map.containsKey(parent)) {
C_map.put(parent, new ArrayList<Object>());
}
C_map.get(parent).add(C);
}
for (Object B : B_list) {
for (BinaryRule A : grammar.getBinaryRulesByLeftChild(getParent(B))) {
if (C_map.containsKey(A.getRightChild())) {
for (Object C : C_map.get(A.getRightChild())) {
// We now have A which has B as left child and C as right child
double prob = Math.log(A.getScore()) + B_scores.get(B) + C_scores.get(C);
if (!A_scores.containsKey(A) || prob > A_scores.get(A)) {
A_scores.put(A, prob);
A_backs.put(A, new Triplet<Integer, Object, Object>(split, B, C));
}
}
}
}
}
}
// Handle unaries: A -> B
boolean added = true;
while (added) {
added = false;
// Don't modify the dict we are iterating
List<Object> A_keys = copyKeys(A_scores);
for (Object oB : A_keys) {
for (UnaryRule A : grammar.getUnaryRulesByChild(getParent(oB))) {
double prob = Math.log(A.getScore()) + A_scores.get(oB);
if (!A_scores.containsKey(A) || prob > A_scores.get(A)) {
A_scores.put(A, prob);
A_backs.put(A, new Triplet<Integer, Object, Object>(-1, oB, null));
added = true;
}
}
}
}
}
}
// printChart(scores, backs, "scores with Lexicon and Grammar");
Map<Object, Double> topOfChart = scores.get(0).get(n);
System.out.println("topOfChart: " + topOfChart.size());
/*
for (Object o: topOfChart.keySet()) {
System.out.println("o=" + o + ", score=" + topOfChart.getCount(o));
}
*/
// All parses have "ROOT" at top of tree
Object bestKey = null;
Object secondBestKey = null;
double bestScore = Double.NEGATIVE_INFINITY;
double secondBestScore = Double.NEGATIVE_INFINITY;
for (Object key : topOfChart.keySet()) {
double score = topOfChart.get(key);
if (score >= secondBestScore || secondBestKey == null) {
secondBestKey = key;
secondBestScore = score;
}
if ("ROOT".equals(getParent(key)) && (score >= bestScore || bestKey == null)) {
bestKey = key;
bestScore = score;
}
}
if (bestKey == null) {
bestKey = secondBestKey;
System.out.println("secondBestKey=" + secondBestKey);
}
if (bestKey == null) {
for (Object key : topOfChart.keySet()) {
System.out.println("val=" + topOfChart.get(key) + ", key=" + key);
}
}
System.out.println("bestKey=" + bestKey + ", log(prob)=" + topOfChart.get(bestKey));
Tree<String> result = makeTree(backs, 0, n, bestKey);
if (!"ROOT".equals(result.getLabel())) {
List<Tree<String>> children = new ArrayList<Tree<String>>();
children.add(result);
result = new Tree<String>("ROOT", children); // !@#$
}
/*
System.out.println("==================================================");
System.out.println(result);
System.out.println("====================^^^^^^========================");
*/
return TreeAnnotations.unAnnotateTree(result);
}
public static void main(String[] args) {
Options op = new Options(new EnglishTreebankParserParams());
// op.tlpParams may be changed to something else later, so don't use it till
// after options are parsed.
System.out.println("Currently " + new Date());
System.out.print("Invoked with arguments:");
for (String arg : args) {
System.out.print(" " + arg);
}
System.out.println();
String path = "/u/nlp/stuff/corpora/Treebank3/parsed/mrg/wsj";
int trainLow = 200, trainHigh = 2199, testLow = 2200, testHigh = 2219;
String serializeFile = null;
int i = 0;
while (i < args.length && args[i].startsWith("-")) {
if (args[i].equalsIgnoreCase("-path") && (i + 1 < args.length)) {
path = args[i + 1];
i += 2;
} else if (args[i].equalsIgnoreCase("-train") && (i + 2 < args.length)) {
trainLow = Integer.parseInt(args[i + 1]);
trainHigh = Integer.parseInt(args[i + 2]);
i += 3;
} else if (args[i].equalsIgnoreCase("-test") && (i + 2 < args.length)) {
testLow = Integer.parseInt(args[i + 1]);
testHigh = Integer.parseInt(args[i + 2]);
i += 3;
} else if (args[i].equalsIgnoreCase("-serialize") && (i + 1 < args.length)) {
serializeFile = args[i + 1];
i += 2;
} else if (args[i].equalsIgnoreCase("-tLPP") && (i + 1 < args.length)) {
try {
op.tlpParams = (TreebankLangParserParams) Class.forName(args[i + 1]).newInstance();
} catch (ClassNotFoundException e) {
System.err.println("Class not found: " + args[i + 1]);
} catch (InstantiationException e) {
System.err.println("Couldn't instantiate: " + args[i + 1] + ": " + e.toString());
} catch (IllegalAccessException e) {
System.err.println("illegal access" + e);
}
i += 2;
} else if (args[i].equals("-encoding")) {
// sets encoding for TreebankLangParserParams
op.tlpParams.setInputEncoding(args[i + 1]);
op.tlpParams.setOutputEncoding(args[i + 1]);
i += 2;
} else {
i = op.setOptionOrWarn(args, i);
}
}
// System.out.println(tlpParams.getClass());
TreebankLanguagePack tlp = op.tlpParams.treebankLanguagePack();
Train.sisterSplitters = new HashSet(Arrays.asList(op.tlpParams.sisterSplitters()));
// BinarizerFactory.TreeAnnotator.setTreebankLang(tlpParams);
PrintWriter pw = op.tlpParams.pw();
Test.display();
Train.display();
op.display();
op.tlpParams.display();
// setup tree transforms
Treebank trainTreebank = op.tlpParams.memoryTreebank();
MemoryTreebank testTreebank = op.tlpParams.testMemoryTreebank();
// Treebank blippTreebank = ((EnglishTreebankParserParams) tlpParams).diskTreebank();
// String blippPath = "/afs/ir.stanford.edu/data/linguistic-data/BLLIP-WSJ/";
// blippTreebank.loadPath(blippPath, "", true);
Timing.startTime();
System.err.print("Reading trees...");
testTreebank.loadPath(path, new NumberRangeFileFilter(testLow, testHigh, true));
if (Test.increasingLength) {
Collections.sort(testTreebank, new TreeLengthComparator());
}
trainTreebank.loadPath(path, new NumberRangeFileFilter(trainLow, trainHigh, true));
Timing.tick("done.");
System.err.print("Binarizing trees...");
TreeAnnotatorAndBinarizer binarizer = null;
if (!Train.leftToRight) {
binarizer =
new TreeAnnotatorAndBinarizer(op.tlpParams, op.forceCNF, !Train.outsideFactor(), true);
} else {
binarizer =
new TreeAnnotatorAndBinarizer(
op.tlpParams.headFinder(),
new LeftHeadFinder(),
op.tlpParams,
op.forceCNF,
!Train.outsideFactor(),
true);
}
CollinsPuncTransformer collinsPuncTransformer = null;
if (Train.collinsPunc) {
collinsPuncTransformer = new CollinsPuncTransformer(tlp);
}
TreeTransformer debinarizer = new Debinarizer(op.forceCNF);
List<Tree> binaryTrainTrees = new ArrayList<Tree>();
if (Train.selectiveSplit) {
Train.splitters =
ParentAnnotationStats.getSplitCategories(
trainTreebank,
Train.tagSelectiveSplit,
0,
Train.selectiveSplitCutOff,
Train.tagSelectiveSplitCutOff,
op.tlpParams.treebankLanguagePack());
if (Train.deleteSplitters != null) {
List<String> deleted = new ArrayList<String>();
for (String del : Train.deleteSplitters) {
String baseDel = tlp.basicCategory(del);
boolean checkBasic = del.equals(baseDel);
for (Iterator<String> it = Train.splitters.iterator(); it.hasNext(); ) {
String elem = it.next();
String baseElem = tlp.basicCategory(elem);
boolean delStr = checkBasic && baseElem.equals(baseDel) || elem.equals(del);
if (delStr) {
it.remove();
deleted.add(elem);
}
}
}
System.err.println("Removed from vertical splitters: " + deleted);
}
}
if (Train.selectivePostSplit) {
TreeTransformer myTransformer = new TreeAnnotator(op.tlpParams.headFinder(), op.tlpParams);
Treebank annotatedTB = trainTreebank.transform(myTransformer);
Train.postSplitters =
ParentAnnotationStats.getSplitCategories(
annotatedTB,
true,
0,
Train.selectivePostSplitCutOff,
Train.tagSelectivePostSplitCutOff,
op.tlpParams.treebankLanguagePack());
}
if (Train.hSelSplit) {
binarizer.setDoSelectiveSplit(false);
for (Tree tree : trainTreebank) {
if (Train.collinsPunc) {
tree = collinsPuncTransformer.transformTree(tree);
}
// tree.pennPrint(tlpParams.pw());
tree = binarizer.transformTree(tree);
// binaryTrainTrees.add(tree);
}
binarizer.setDoSelectiveSplit(true);
}
for (Tree tree : trainTreebank) {
if (Train.collinsPunc) {
tree = collinsPuncTransformer.transformTree(tree);
}
tree = binarizer.transformTree(tree);
binaryTrainTrees.add(tree);
}
if (Test.verbose) {
binarizer.dumpStats();
}
List<Tree> binaryTestTrees = new ArrayList<Tree>();
for (Tree tree : testTreebank) {
if (Train.collinsPunc) {
tree = collinsPuncTransformer.transformTree(tree);
}
tree = binarizer.transformTree(tree);
binaryTestTrees.add(tree);
}
Timing.tick("done."); // binarization
BinaryGrammar bg = null;
UnaryGrammar ug = null;
DependencyGrammar dg = null;
// DependencyGrammar dgBLIPP = null;
Lexicon lex = null;
// extract grammars
Extractor bgExtractor = new BinaryGrammarExtractor();
// Extractor bgExtractor = new SmoothedBinaryGrammarExtractor();//new BinaryGrammarExtractor();
// Extractor lexExtractor = new LexiconExtractor();
// Extractor dgExtractor = new DependencyMemGrammarExtractor();
Extractor dgExtractor = new MLEDependencyGrammarExtractor(op);
if (op.doPCFG) {
System.err.print("Extracting PCFG...");
Pair bgug = null;
if (Train.cheatPCFG) {
List allTrees = new ArrayList(binaryTrainTrees);
allTrees.addAll(binaryTestTrees);
bgug = (Pair) bgExtractor.extract(allTrees);
} else {
bgug = (Pair) bgExtractor.extract(binaryTrainTrees);
}
bg = (BinaryGrammar) bgug.second;
bg.splitRules();
ug = (UnaryGrammar) bgug.first;
ug.purgeRules();
Timing.tick("done.");
}
System.err.print("Extracting Lexicon...");
lex = op.tlpParams.lex(op.lexOptions);
lex.train(binaryTrainTrees);
Timing.tick("done.");
if (op.doDep) {
System.err.print("Extracting Dependencies...");
binaryTrainTrees.clear();
// dgBLIPP = (DependencyGrammar) dgExtractor.extract(new
// ConcatenationIterator(trainTreebank.iterator(),blippTreebank.iterator()),new
// TransformTreeDependency(tlpParams,true));
DependencyGrammar dg1 =
(DependencyGrammar)
dgExtractor.extract(
trainTreebank.iterator(), new TransformTreeDependency(op.tlpParams, true));
// dgBLIPP=(DependencyGrammar)dgExtractor.extract(blippTreebank.iterator(),new
// TransformTreeDependency(tlpParams));
// dg = (DependencyGrammar) dgExtractor.extract(new
// ConcatenationIterator(trainTreebank.iterator(),blippTreebank.iterator()),new
// TransformTreeDependency(tlpParams));
// dg=new DependencyGrammarCombination(dg1,dgBLIPP,2);
// dg = (DependencyGrammar) dgExtractor.extract(binaryTrainTrees); //uses information whether
// the words are known or not, discards unknown words
Timing.tick("done.");
// System.out.print("Extracting Unknown Word Model...");
// UnknownWordModel uwm = (UnknownWordModel)uwmExtractor.extract(binaryTrainTrees);
// Timing.tick("done.");
System.out.print("Tuning Dependency Model...");
dg.tune(binaryTestTrees);
// System.out.println("TUNE DEPS: "+tuneDeps);
Timing.tick("done.");
}
BinaryGrammar boundBG = bg;
UnaryGrammar boundUG = ug;
GrammarProjection gp = new NullGrammarProjection(bg, ug);
// serialization
if (serializeFile != null) {
System.err.print("Serializing parser...");
LexicalizedParser.saveParserDataToSerialized(
new ParserData(lex, bg, ug, dg, Numberer.getNumberers(), op), serializeFile);
Timing.tick("done.");
}
// test: pcfg-parse and output
ExhaustivePCFGParser parser = null;
if (op.doPCFG) {
parser = new ExhaustivePCFGParser(boundBG, boundUG, lex, op);
}
ExhaustiveDependencyParser dparser =
((op.doDep && !Test.useFastFactored) ? new ExhaustiveDependencyParser(dg, lex, op) : null);
Scorer scorer = (op.doPCFG ? new TwinScorer(new ProjectionScorer(parser, gp), dparser) : null);
// Scorer scorer = parser;
BiLexPCFGParser bparser = null;
if (op.doPCFG && op.doDep) {
bparser =
(Test.useN5)
? new BiLexPCFGParser.N5BiLexPCFGParser(
scorer, parser, dparser, bg, ug, dg, lex, op, gp)
: new BiLexPCFGParser(scorer, parser, dparser, bg, ug, dg, lex, op, gp);
}
LabeledConstituentEval pcfgPE = new LabeledConstituentEval("pcfg PE", true, tlp);
LabeledConstituentEval comboPE = new LabeledConstituentEval("combo PE", true, tlp);
AbstractEval pcfgCB = new LabeledConstituentEval.CBEval("pcfg CB", true, tlp);
AbstractEval pcfgTE = new AbstractEval.TaggingEval("pcfg TE");
AbstractEval comboTE = new AbstractEval.TaggingEval("combo TE");
AbstractEval pcfgTEnoPunct = new AbstractEval.TaggingEval("pcfg nopunct TE");
AbstractEval comboTEnoPunct = new AbstractEval.TaggingEval("combo nopunct TE");
AbstractEval depTE = new AbstractEval.TaggingEval("depnd TE");
AbstractEval depDE =
new AbstractEval.DependencyEval("depnd DE", true, tlp.punctuationWordAcceptFilter());
AbstractEval comboDE =
new AbstractEval.DependencyEval("combo DE", true, tlp.punctuationWordAcceptFilter());
if (Test.evalb) {
EvalB.initEVALBfiles(op.tlpParams);
}
// int[] countByLength = new int[Test.maxLength+1];
// use a reflection ruse, so one can run this without needing the tagger
// edu.stanford.nlp.process.SentenceTagger tagger = (Test.preTag ? new
// edu.stanford.nlp.process.SentenceTagger("/u/nlp/data/tagger.params/wsj0-21.holder") : null);
SentenceProcessor tagger = null;
if (Test.preTag) {
try {
Class[] argsClass = new Class[] {String.class};
Object[] arguments =
new Object[] {"/u/nlp/data/pos-tagger/wsj3t0-18-bidirectional/train-wsj-0-18.holder"};
tagger =
(SentenceProcessor)
Class.forName("edu.stanford.nlp.tagger.maxent.MaxentTagger")
.getConstructor(argsClass)
.newInstance(arguments);
} catch (Exception e) {
System.err.println(e);
System.err.println("Warning: No pretagging of sentences will be done.");
}
}
for (int tNum = 0, ttSize = testTreebank.size(); tNum < ttSize; tNum++) {
Tree tree = testTreebank.get(tNum);
int testTreeLen = tree.yield().size();
if (testTreeLen > Test.maxLength) {
continue;
}
Tree binaryTree = binaryTestTrees.get(tNum);
// countByLength[testTreeLen]++;
System.out.println("-------------------------------------");
System.out.println("Number: " + (tNum + 1));
System.out.println("Length: " + testTreeLen);
// tree.pennPrint(pw);
// System.out.println("XXXX The binary tree is");
// binaryTree.pennPrint(pw);
// System.out.println("Here are the tags in the lexicon:");
// System.out.println(lex.showTags());
// System.out.println("Here's the tagnumberer:");
// System.out.println(Numberer.getGlobalNumberer("tags").toString());
long timeMil1 = System.currentTimeMillis();
Timing.tick("Starting parse.");
if (op.doPCFG) {
// System.err.println(Test.forceTags);
if (Test.forceTags) {
if (tagger != null) {
// System.out.println("Using a tagger to set tags");
// System.out.println("Tagged sentence as: " +
// tagger.processSentence(cutLast(wordify(binaryTree.yield()))).toString(false));
parser.parse(addLast(tagger.processSentence(cutLast(wordify(binaryTree.yield())))));
} else {
// System.out.println("Forcing tags to match input.");
parser.parse(cleanTags(binaryTree.taggedYield(), tlp));
}
} else {
// System.out.println("XXXX Parsing " + binaryTree.yield());
parser.parse(binaryTree.yield());
}
// Timing.tick("Done with pcfg phase.");
}
if (op.doDep) {
dparser.parse(binaryTree.yield());
// Timing.tick("Done with dependency phase.");
}
boolean bothPassed = false;
if (op.doPCFG && op.doDep) {
bothPassed = bparser.parse(binaryTree.yield());
// Timing.tick("Done with combination phase.");
}
long timeMil2 = System.currentTimeMillis();
long elapsed = timeMil2 - timeMil1;
System.err.println("Time: " + ((int) (elapsed / 100)) / 10.00 + " sec.");
// System.out.println("PCFG Best Parse:");
Tree tree2b = null;
Tree tree2 = null;
// System.out.println("Got full best parse...");
if (op.doPCFG) {
tree2b = parser.getBestParse();
tree2 = debinarizer.transformTree(tree2b);
}
// System.out.println("Debinarized parse...");
// tree2.pennPrint();
// System.out.println("DepG Best Parse:");
Tree tree3 = null;
Tree tree3db = null;
if (op.doDep) {
tree3 = dparser.getBestParse();
// was: but wrong Tree tree3db = debinarizer.transformTree(tree2);
tree3db = debinarizer.transformTree(tree3);
tree3.pennPrint(pw);
}
// tree.pennPrint();
// ((Tree)binaryTrainTrees.get(tNum)).pennPrint();
// System.out.println("Combo Best Parse:");
Tree tree4 = null;
if (op.doPCFG && op.doDep) {
try {
tree4 = bparser.getBestParse();
if (tree4 == null) {
tree4 = tree2b;
}
} catch (NullPointerException e) {
System.err.println("Blocked, using PCFG parse!");
tree4 = tree2b;
}
}
if (op.doPCFG && !bothPassed) {
tree4 = tree2b;
}
// tree4.pennPrint();
if (op.doDep) {
depDE.evaluate(tree3, binaryTree, pw);
depTE.evaluate(tree3db, tree, pw);
}
TreeTransformer tc = op.tlpParams.collinizer();
TreeTransformer tcEvalb = op.tlpParams.collinizerEvalb();
Tree tree4b = null;
if (op.doPCFG) {
// System.out.println("XXXX Best PCFG was: ");
// tree2.pennPrint();
// System.out.println("XXXX Transformed best PCFG is: ");
// tc.transformTree(tree2).pennPrint();
// System.out.println("True Best Parse:");
// tree.pennPrint();
// tc.transformTree(tree).pennPrint();
pcfgPE.evaluate(tc.transformTree(tree2), tc.transformTree(tree), pw);
pcfgCB.evaluate(tc.transformTree(tree2), tc.transformTree(tree), pw);
if (op.doDep) {
comboDE.evaluate((bothPassed ? tree4 : tree3), binaryTree, pw);
tree4b = tree4;
tree4 = debinarizer.transformTree(tree4);
if (op.nodePrune) {
NodePruner np = new NodePruner(parser, debinarizer);
tree4 = np.prune(tree4);
}
// tree4.pennPrint();
comboPE.evaluate(tc.transformTree(tree4), tc.transformTree(tree), pw);
}
// pcfgTE.evaluate(tree2, tree);
pcfgTE.evaluate(tcEvalb.transformTree(tree2), tcEvalb.transformTree(tree), pw);
pcfgTEnoPunct.evaluate(tc.transformTree(tree2), tc.transformTree(tree), pw);
if (op.doDep) {
comboTE.evaluate(tcEvalb.transformTree(tree4), tcEvalb.transformTree(tree), pw);
comboTEnoPunct.evaluate(tc.transformTree(tree4), tc.transformTree(tree), pw);
}
System.out.println("PCFG only: " + parser.scoreBinarizedTree(tree2b, 0));
// tc.transformTree(tree2).pennPrint();
tree2.pennPrint(pw);
if (op.doDep) {
System.out.println("Combo: " + parser.scoreBinarizedTree(tree4b, 0));
// tc.transformTree(tree4).pennPrint(pw);
tree4.pennPrint(pw);
}
System.out.println("Correct:" + parser.scoreBinarizedTree(binaryTree, 0));
/*
if (parser.scoreBinarizedTree(tree2b,true) < parser.scoreBinarizedTree(binaryTree,true)) {
System.out.println("SCORE INVERSION");
parser.validateBinarizedTree(binaryTree,0);
}
*/
tree.pennPrint(pw);
} // end if doPCFG
if (Test.evalb) {
if (op.doPCFG && op.doDep) {
EvalB.writeEVALBline(tcEvalb.transformTree(tree), tcEvalb.transformTree(tree4));
} else if (op.doPCFG) {
EvalB.writeEVALBline(tcEvalb.transformTree(tree), tcEvalb.transformTree(tree2));
} else if (op.doDep) {
EvalB.writeEVALBline(tcEvalb.transformTree(tree), tcEvalb.transformTree(tree3db));
}
}
} // end for each tree in test treebank
if (Test.evalb) {
EvalB.closeEVALBfiles();
}
// Test.display();
if (op.doPCFG) {
pcfgPE.display(false, pw);
System.out.println("Grammar size: " + Numberer.getGlobalNumberer("states").total());
pcfgCB.display(false, pw);
if (op.doDep) {
comboPE.display(false, pw);
}
pcfgTE.display(false, pw);
pcfgTEnoPunct.display(false, pw);
if (op.doDep) {
comboTE.display(false, pw);
comboTEnoPunct.display(false, pw);
}
}
if (op.doDep) {
depTE.display(false, pw);
depDE.display(false, pw);
}
if (op.doPCFG && op.doDep) {
comboDE.display(false, pw);
}
// pcfgPE.printGoodBad();
}
public void stocGradTrain(Parser parser, boolean testEachRound) {
int numUpdates = 0;
List<LexEntry> fixedEntries = new LinkedList<LexEntry>();
fixedEntries.addAll(parser.returnLex().getLexicon());
// add all sentential lexical entries.
for (int l = 0; l < trainData.size(); l++) {
parser.addLexEntries(trainData.getDataSet(l).makeSentEntries());
}
parser.setGlobals();
DataSet data = null;
// for each pass over the data
for (int j = 0; j < EPOCHS; j++) {
System.out.println("Training, iteration " + j);
int total = 0, correct = 0, wrong = 0, looCorrect = 0, looWrong = 0;
for (int l = 0; l < trainData.size(); l++) {
// the variables to hold the current training example
String words = null;
Exp sem = null;
data = trainData.getDataSet(l);
if (verbose) System.out.println("---------------------");
String filename = trainData.getFilename(l);
if (verbose) System.out.println("DataSet: " + filename);
if (verbose) System.out.println("---------------------");
// loop through the training examples
// try to create lexical entries for each training example
for (int i = 0; i < data.size(); i++) {
// print running stats
if (verbose) {
if (total != 0) {
double r = (double) correct / total;
double p = (double) correct / (correct + wrong);
System.out.print(i + ": =========== r:" + r + " p:" + p);
System.out.println(" (epoch:" + j + " file:" + l + " " + filename + ")");
} else System.out.println(i + ": ===========");
}
// get the training example
words = data.sent(i);
sem = data.sem(i);
if (verbose) {
System.out.println(words);
System.out.println(sem);
}
List<String> tokens = Parser.tokenize(words);
if (tokens.size() > maxSentLen) continue;
total++;
String mes = null;
boolean hasCorrect = false;
// first, get all possible lexical entries from
// a manipulation of the best parse.
List<LexEntry> lex = makeLexEntriesChart(words, sem, parser);
if (verbose) {
System.out.println("Adding:");
for (LexEntry le : lex) {
System.out.println(le + " : " + LexiconFeatSet.initialWeight(le));
}
}
parser.addLexEntries(lex);
if (verbose) System.out.println("Lex Size: " + parser.returnLex().size());
// first parse to see if we are currently correct
if (verbose) mes = "First";
parser.parseTimed(words, null, mes);
Chart firstChart = parser.getChart();
Exp best = parser.bestSem();
// this just collates and outputs the training
// accuracy.
if (sem.equals(best)) {
// System.out.println(parser.bestParses().get(0));
if (verbose) {
System.out.println("CORRECT:" + best);
lex = parser.getMaxLexEntriesFor(sem);
System.out.println("Using:");
printLex(lex);
if (lex.size() == 0) {
System.out.println("ERROR: empty lex");
}
}
correct++;
} else {
if (verbose) {
System.out.println("WRONG: " + best);
lex = parser.getMaxLexEntriesFor(best);
System.out.println("Using:");
printLex(lex);
if (best != null && lex.size() == 0) {
System.out.println("ERROR: empty lex");
}
}
wrong++;
}
// compute first half of parameter update:
// subtract the expectation of parameters
// under the distribution that is conditioned
// on the sentence alone.
double norm = firstChart.computeNorm();
HashVector update = new HashVector();
HashVector firstfeats = null, secondfeats = null;
if (norm != 0.0) {
firstfeats = firstChart.computeExpFeatVals();
firstfeats.divideBy(norm);
firstfeats.dropSmallEntries();
firstfeats.addTimesInto(-1.0, update);
} else continue;
firstChart = null;
if (verbose) mes = "Second";
parser.parseTimed(words, sem, mes);
hasCorrect = parser.hasParseFor(sem);
// compute second half of parameter update:
// add the expectation of parameters
// under the distribution that is conditioned
// on the sentence and correct logical form.
if (!hasCorrect) continue;
Chart secondChart = parser.getChart();
double secnorm = secondChart.computeNorm(sem);
if (norm != 0.0) {
secondfeats = secondChart.computeExpFeatVals(sem);
secondfeats.divideBy(secnorm);
secondfeats.dropSmallEntries();
secondfeats.addTimesInto(1.0, update);
lex = parser.getMaxLexEntriesFor(sem);
data.setBestLex(i, lex);
if (verbose) {
System.out.println("Best LexEntries:");
printLex(lex);
if (lex.size() == 0) {
System.out.println("ERROR: empty lex");
}
}
} else continue;
// now do the update
double scale = alpha_0 / (1.0 + c * numUpdates);
if (verbose) System.out.println("Scale: " + scale);
update.multiplyBy(scale);
update.dropSmallEntries();
numUpdates++;
if (verbose) {
System.out.println("Update:");
System.out.println(update);
}
if (!update.isBad()) {
if (!update.valuesInRange(-100, 100)) {
System.out.println("WARNING: large update");
System.out.println("first feats: " + firstfeats);
System.out.println("second feats: " + secondfeats);
}
parser.updateParams(update);
} else {
System.out.println(
"ERROR: Bad Update: " + update + " -- norm: " + norm + " -- feats: ");
parser.getParams().printValues(update);
System.out.println();
}
} // end for each training example
} // end for each data set
double r = (double) correct / total;
// we can prune the lexical items that were not used
// in a max scoring parse.
if (pruneLex) {
Lexicon cur = new Lexicon();
cur.addLexEntries(fixedEntries);
cur.addLexEntries(data.getBestLex());
parser.setLexicon(cur);
}
if (testEachRound) {
System.out.println("Testing");
test(parser, false);
}
} // end epochs loop
}
public Tree<String> getBestParseOld(List<String> sentence) {
// TODO: This implements the CKY algorithm
CounterMap<String, String> parseScores = new CounterMap<String, String>();
System.out.println(sentence.toString());
// First deal with the lexicons
int index = 0;
int span = 1; // All spans are 1 at the lexicon level
for (String word : sentence) {
for (String tag : lexicon.getAllTags()) {
double score = lexicon.scoreTagging(word, tag);
if (score >= 0.0) { // This lexicon may generate this word
// We use a counter map in order to store the scores for this sentence parse.
parseScores.setCount(index + " " + (index + span), tag, score);
}
}
index = index + 1;
}
// handle unary rules now
HashMap<String, Triplet<Integer, String, String>> backHash =
new HashMap<
String, Triplet<Integer, String, String>>(); // hashmap to store back propation
// System.out.println("Lexicons found");
Boolean added = true;
while (added) {
added = false;
for (index = 0; index < sentence.size(); index++) {
// For each index+ span pair, get the counter.
Counter<String> count = parseScores.getCounter(index + " " + (index + span));
PriorityQueue<String> countAsPQ = count.asPriorityQueue();
while (countAsPQ.hasNext()) {
String entry = countAsPQ.next();
// System.out.println("I am fine here!!");
List<UnaryRule> unaryRules = grammar.getUnaryRulesByChild(entry);
for (UnaryRule rule : unaryRules) {
// These are the unary rules which might give rise to the above preterminal
double prob =
rule.getScore() * parseScores.getCount(index + " " + (index + span), entry);
if (prob > parseScores.getCount(index + " " + (index + span), rule.parent)) {
parseScores.setCount(index + " " + (index + span), rule.parent, prob);
backHash.put(
index + " " + (index + span) + " " + rule.parent,
new Triplet<Integer, String, String>(-1, entry, null));
added = true;
}
}
}
}
}
// System.out.println("Lexicon unaries dealt with");
// Now work with the grammar to produce higher level probabilities
for (span = 2; span <= sentence.size(); span++) {
for (int begin = 0; begin <= (sentence.size() - span); begin++) {
int end = begin + span;
for (int split = begin + 1; split <= end - 1; split++) {
Counter<String> countLeft = parseScores.getCounter(begin + " " + split);
Counter<String> countRight = parseScores.getCounter(split + " " + end);
// List<BinaryRule> leftRules= new ArrayList<BinaryRule>();
HashMap<Integer, BinaryRule> leftMap = new HashMap<Integer, BinaryRule>();
// List<BinaryRule> rightRules=new ArrayList<BinaryRule>();
HashMap<Integer, BinaryRule> rightMap = new HashMap<Integer, BinaryRule>();
for (String entry : countLeft.keySet()) {
for (BinaryRule rule : grammar.getBinaryRulesByLeftChild(entry)) {
if (!leftMap.containsKey(rule.hashCode())) {
leftMap.put(rule.hashCode(), rule);
}
}
}
for (String entry : countRight.keySet()) {
for (BinaryRule rule : grammar.getBinaryRulesByRightChild(entry)) {
if (!rightMap.containsKey(rule.hashCode())) {
rightMap.put(rule.hashCode(), rule);
}
}
}
// System.out.println("About to enter the rules loops");
for (Integer ruleHash : leftMap.keySet()) {
if (rightMap.containsKey(ruleHash)) {
BinaryRule ruleRight = rightMap.get(ruleHash);
double prob =
ruleRight.getScore()
* parseScores.getCount(begin + " " + split, ruleRight.leftChild)
* parseScores.getCount(split + " " + end, ruleRight.rightChild);
// System.out.println(begin+" "+ end +" "+ ruleRight.parent+ " "+ prob);
if (prob > parseScores.getCount(begin + " " + end, ruleRight.parent)) {
// System.out.println(begin+" "+ end +" "+ ruleRight.parent+ " "+ prob);
// System.out.println("parentrule :"+ ruleRight.getParent());
parseScores.setCount(begin + " " + end, ruleRight.getParent(), prob);
backHash.put(
begin + " " + end + " " + ruleRight.parent,
new Triplet<Integer, String, String>(
split, ruleRight.leftChild, ruleRight.rightChild));
}
}
}
// System.out.println("Exited rules loop");
}
// System.out.println("Grammar found for " + begin + " "+ end);
// Now handle unary rules
added = true;
while (added) {
added = false;
Counter<String> count = parseScores.getCounter(begin + " " + end);
PriorityQueue<String> countAsPriorityQueue = count.asPriorityQueue();
while (countAsPriorityQueue.hasNext()) {
String entry = countAsPriorityQueue.next();
List<UnaryRule> unaryRules = grammar.getUnaryRulesByChild(entry);
for (UnaryRule rule : unaryRules) {
double prob = rule.getScore() * parseScores.getCount(begin + " " + (end), entry);
if (prob > parseScores.getCount(begin + " " + (end), rule.parent)) {
parseScores.setCount(begin + " " + (end), rule.parent, prob);
backHash.put(
begin + " " + (end) + " " + rule.parent,
new Triplet<Integer, String, String>(-1, entry, null));
added = true;
}
}
}
}
// System.out.println("Unaries dealt for " + begin + " "+ end);
}
}
// Create and return the parse tree
Tree<String> parseTree = new Tree<String>("null");
// System.out.println(parseScores.getCounter(0+" "+sentence.size()).toString());
String parent = parseScores.getCounter(0 + " " + sentence.size()).argMax();
if (parent == null) {
System.out.println(parseScores.getCounter(0 + " " + sentence.size()).toString());
System.out.println("THIS IS WEIRD");
}
parent = "ROOT";
parseTree = getParseTreeOld(sentence, backHash, 0, sentence.size(), parent);
// System.out.println("PARSE SCORES");
// System.out.println(parseScores.toString());
// System.out.println("BACK HASH");
// System.out.println(backHash.toString());
// parseTree = addRoot(parseTree);
// System.out.println(parseTree.toString());
// return parseTree;
return TreeAnnotations.unAnnotateTree(parseTree);
}
public Tree<String> getBestParse(List<String> sentence) {
// This implements the CKY algorithm
int nEntries = sentence.size();
// hashmap to store back rules
HashMap<Triplet<Integer, Integer, String>, Triplet<Integer, String, String>> backHash =
new HashMap<Triplet<Integer, Integer, String>, Triplet<Integer, String, String>>();
// more efficient access with arrays, but must cast each time :(
@SuppressWarnings("unchecked")
Counter<String>[][] parseScores = (Counter<String>[][]) (new Counter[nEntries][nEntries]);
for (int i = 0; i < nEntries; i++) {
for (int j = 0; j < nEntries; j++) {
parseScores[i][j] = new Counter<String>();
}
}
System.out.println(sentence.toString());
// First deal with the lexicons
int index = 0;
int span = 1; // All spans are 1 at the lexicon level
for (String word : sentence) {
for (String tag : lexicon.getAllTags()) {
double score = lexicon.scoreTagging(word, tag);
if (score >= 0.0) { // This lexicon may generate this word
// We use a counter map in order to store the scores for this sentence parse.
parseScores[index][index + span - 1].setCount(tag, score);
}
}
index = index + 1;
}
// handle unary rules now
// System.out.println("Lexicons found");
boolean added = true;
while (added) {
added = false;
for (index = 0; index < sentence.size(); index++) {
// For each index+ span pair, get the counter.
Counter<String> count = parseScores[index][index + span - 1];
PriorityQueue<String> countAsPQ = count.asPriorityQueue();
while (countAsPQ.hasNext()) {
String entry = countAsPQ.next();
// System.out.println("I am fine here!!");
List<UnaryRule> unaryRules = grammar.getUnaryRulesByChild(entry);
for (UnaryRule rule : unaryRules) {
// These are the unary rules which might give rise to the above preterminal
double prob = rule.getScore() * parseScores[index][index + span - 1].getCount(entry);
if (prob > parseScores[index][index + span - 1].getCount(rule.parent)) {
parseScores[index][index + span - 1].setCount(rule.parent, prob);
backHash.put(
new Triplet<Integer, Integer, String>(index, index + span, rule.parent),
new Triplet<Integer, String, String>(-1, entry, null));
added = true;
}
}
}
}
}
// System.out.println("Lexicon unaries dealt with");
// Now work with the grammar to produce higher level probabilities
for (span = 2; span <= sentence.size(); span++) {
for (int begin = 0; begin <= (sentence.size() - span); begin++) {
int end = begin + span;
for (int split = begin + 1; split <= end - 1; split++) {
Counter<String> countLeft = parseScores[begin][split - 1];
Counter<String> countRight = parseScores[split][end - 1];
// List<BinaryRule> leftRules= new ArrayList<BinaryRule>();
HashMap<Integer, BinaryRule> leftMap = new HashMap<Integer, BinaryRule>();
// List<BinaryRule> rightRules=new ArrayList<BinaryRule>();
HashMap<Integer, BinaryRule> rightMap = new HashMap<Integer, BinaryRule>();
for (String entry : countLeft.keySet()) {
for (BinaryRule rule : grammar.getBinaryRulesByLeftChild(entry)) {
if (!leftMap.containsKey(rule.hashCode())) {
leftMap.put(rule.hashCode(), rule);
}
}
}
for (String entry : countRight.keySet()) {
for (BinaryRule rule : grammar.getBinaryRulesByRightChild(entry)) {
if (!rightMap.containsKey(rule.hashCode())) {
rightMap.put(rule.hashCode(), rule);
}
}
}
// System.out.println("About to enter the rules loops");
for (Integer ruleHash : leftMap.keySet()) {
if (rightMap.containsKey(ruleHash)) {
BinaryRule ruleRight = rightMap.get(ruleHash);
double prob =
ruleRight.getScore()
* parseScores[begin][split - 1].getCount(ruleRight.leftChild)
* parseScores[split][end - 1].getCount(ruleRight.rightChild);
// System.out.println(begin+" "+ end +" "+ ruleRight.parent+ " "+ prob);
if (prob > parseScores[begin][end - 1].getCount(ruleRight.parent)) {
// System.out.println(begin+" "+ end +" "+ ruleRight.parent+ " "+ prob);
// System.out.println("parentrule :"+ ruleRight.getParent());
parseScores[begin][end - 1].setCount(ruleRight.getParent(), prob);
backHash.put(
new Triplet<Integer, Integer, String>(begin, end, ruleRight.parent),
new Triplet<Integer, String, String>(
split, ruleRight.leftChild, ruleRight.rightChild));
}
}
}
// System.out.println("Exited rules loop");
}
// System.out.println("Grammar found for " + begin + " "+ end);
// Now handle unary rules
added = true;
while (added) {
added = false;
Counter<String> count = parseScores[begin][end - 1];
PriorityQueue<String> countAsPriorityQueue = count.asPriorityQueue();
while (countAsPriorityQueue.hasNext()) {
String entry = countAsPriorityQueue.next();
List<UnaryRule> unaryRules = grammar.getUnaryRulesByChild(entry);
for (UnaryRule rule : unaryRules) {
double prob = rule.getScore() * parseScores[begin][end - 1].getCount(entry);
if (prob > parseScores[begin][end - 1].getCount(rule.parent)) {
parseScores[begin][end - 1].setCount(rule.parent, prob);
backHash.put(
new Triplet<Integer, Integer, String>(begin, end, rule.parent),
new Triplet<Integer, String, String>(-1, entry, null));
added = true;
}
}
}
}
// System.out.println("Unaries dealt for " + begin + " "+ end);
}
}
// Create and return the parse tree
Tree<String> parseTree = new Tree<String>("null");
// System.out.println(parseScores.getCounter(0+" "+sentence.size()).toString());
// Pick the argmax
String parent = parseScores[0][nEntries - 1].argMax();
// Or pick root. This second one is preferred since sentences are meant to have ROOT as their
// root node.
parent = "ROOT";
parseTree = getParseTree(sentence, backHash, 0, sentence.size(), parent);
// System.out.println("PARSE SCORES");
// System.out.println(parseScores.toString());
// System.out.println("BACK HASH");
// System.out.println(backHash.toString());
// parseTree = addRoot(parseTree);
// System.out.println(parseTree.toString());
// return parseTree;
return TreeAnnotations.unAnnotateTree(parseTree);
}