/**
* Gets the best parse tree spanning the entire sentence.
*
* @return
*/
public CfgParseTree getBestParseTree() {
Factor rootMarginal = getMarginalEntries(0, chartSize() - 1);
Assignment bestAssignment = rootMarginal.getMostLikelyAssignments(1).get(0);
return getBestParseTree(bestAssignment.getOnlyValue());
}
