@Override
public List<Constituent> transform(Constituent input) {
TextAnnotation ta = input.getTextAnnotation();
int tokenPosition = input.getStartSpan();
TreeView dependency = (TreeView) ta.getView(ViewNames.DEPENDENCY);
Constituent verbNode = dependency.getConstituentsCoveringToken(tokenPosition).get(0);
boolean done = false;
while (!done) {
String pos = WordHelpers.getPOS(ta, verbNode.getStartSpan());
if (POSUtils.isPOSVerb(pos)) {
done = true;
} else {
List<Relation> incoming = verbNode.getIncomingRelations();
if (incoming == null || incoming.size() == 0) {
return new ArrayList<>();
} else verbNode = incoming.get(0).getSource();
}
}
return Collections.singletonList(addPointerToSource(input, verbNode));
}