Method for extracting from a text corpus answers to questions stated in natural language by using linguistic analysis and hypothesis generation
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United States of America Patent
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May 21, 1996
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N/A
app pub date -
Jun 24, 1993
filing date -
Jun 24, 1993
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Abstract
A computerized method for organizing information retrieval based on the content of a set of primary documents. The method generates answer hypotheses based on text found in the primary documents and, typically, a natural-language input string such as a question. The answer hypotheses can include phrases or words not present in the input string. Answer hypotheses are verified and ranked based on their verification evidence. A text corpus can be queried to provide verification evidence not present in the primary documents. In another aspect the method is implemented in the context of a larger two-phase method, of which the first phase comprises the method of the invention and the second phase of the method comprises answer extraction.
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