5. The method of claim 2 , further comprising: changing, by at least one of the data processors, entity types based on evidence from the rest of a document upon identification of segmentation errors; recognizing, by at least one of the data processors, additional mentions if identical strings were recognized as entities, elsewhere in said document.
2. The method of claim 1 , further comprising: using one or more named entity recognition (NER) systems to provide input for entity disambiguation; each NER providing mention start and stop boundaries, entity type assertions, and confidence values.