this.entityFeatureExtractors.add(new NegationDependencyFeatureExtractor());
}
if(featConfig == FEATURE_CONFIG.STK){
// stk constituency feature:
this.entityTreeExtractors.add(new AssertionAboveLeftTreeExtractor());
}
if(featConfig == FEATURE_CONFIG.PTK){
// ptk dependency feature:
this.entityTreeExtractors.add(new AssertionDependencyTreeExtractor());