Unsupervised extraction of facts

摘要

A system and method for extracting facts from documents. A fact is extracted from a first document. The attribute and value of the fact extracted from the first document are used as a seed attribute-value pair. A second document containing the seed attribute-value pair is analyzed to determine a contextual pattern used in the second document. The contextual pattern is used to extract other attribute-value pairs from the second document. The extracted attributes and values are stored as facts.

主权项

1. A computer-implemented method for extracting facts, the method comprising:
at a computer system including one or more processors and memory storing one or more programs, the one or more processors executing the one or more programs to perform the operations of:
identifying a first fact having an attribute and a value obtained from a first document;retrieving a second document that contains the attribute and the value of the first fact;identifying in the second document a contextual pattern associated with the attribute and value of the first fact;extracting a second fact from the second document using the contextual pattern, the second fact having an attribute that is different than the attribute of the first fact and having a value that is different than the value of the first fact; andstoring the first fact and the second fact in a fact repository of the computer system.