Discovery of inference rules from text
First Claim
1. A method of building a database from text, the method comprising the steps of:
- parsing text to identify paths formed by concatenated relationships between words in the text; and
generating a database of inference rules comprising pairs of semantically equivalent paths by associating, in a computer, paths with each other based on a similarity measure between the paths.
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Abstract
The present invention provides a facility for discovering a set of inference rules, such as “X is author of Y≈X wrote Y”, “X solved Y≈X found a solution to Y”, and “X caused Y≈Y is triggered by X”, by analyzing a corpus of natural language text. The corpus is parsed to identify grammatical relationships between words and to build dependency trees formed of the relationships between the words. Paths linking words in the dependency trees are identified. If two paths tend to link the same sets of words, their meanings are taken to be similar. An inference rule is generated for each pair of similar paths. The output of the inventive system is a set of inference rules and a database in which to store these inference rules. The rules generated by the system are interpretable by machines and used in other applications (e.g. information extraction, information retrieval, and machine translation).
34 Citations
19 Claims
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1. A method of building a database from text, the method comprising the steps of:
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parsing text to identify paths formed by concatenated relationships between words in the text; and generating a database of inference rules comprising pairs of semantically equivalent paths by associating, in a computer, paths with each other based on a similarity measure between the paths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification