@Override
protected List<RelationFeaturesExtractor> getFeatureExtractors() {
return Lists.newArrayList(
new TokenFeaturesExtractor()
, new PartOfSpeechFeaturesExtractor()
// , new TemporalAttributeFeatureExtractor()
// , new EventTimeFlatTreeFeatureExtractor()
, new TemporalPETExtractor()
// , new TemporalPathExtractor()
// , new EventVerbRelationTreeExtractor()