System and Method for Processing Negation Expressions in Natural Language Processing

摘要

A system and method for analyzing a string of unstructured text includes parsing the string of unstructured text, recognizing at least one word in the string of unstructured text representing at least one named entity, searching for at least one word in the string of unstructured text representing a negation expression preceding the at least one named entity, searching for at least one word in the string of unstructured text representing a negation expression following the at least one named entity, and tagging the at least one named entity as at least one negative named entity in response to identifying at least one word representing a negation expression preceding or following the at least one named entity.