Being the natural statement search device which inputs the question statement

摘要

PROBLEM TO BE SOLVED: To provide a natural sentence retrieval device wherein a question sentence expressed in natural language is inputted as an information retrieval demand and a document including a reply to the question sentence and having high conformity can be outputted.;SOLUTION: This natural sentence retrieval device 10 retrieving a document with high conformity from the question sentence expressed in the natural language is disclosed. This device 10 has a question analysis part 101 generating a retrieval key word set from the question sentence, a document retrieval part 102 extracting the retrieved document and KWIC in the document, and a document re-ranking part 103 ranking the document with the expected value included the document as the reply to the question as a scale of the conformity of the document.;COPYRIGHT: (C)2005,JPO&NCIPI