code: public Factvalue newFactvalue(WF wf, String prediction) {
  	Factvalue factuality = new Factvalue(wf, prediction);
  	annotationContainer.add(factuality, Layer.FACTUALITY_LAYER, AnnotationType.FACTVALUE);
  	return factuality;
      }
docs: Creates a factualitylayer object and add it to the document
  @param term the Term of the coreference.
  @return a new factuality.