QUERY RESPONSE DEVICE, QUERY RESPONSE METHOD, QUERY RESPONSE PROGRAM, AND RECORDING MEDIUM WITH PROGRAM RECORDED THEREON

摘要

PPROBLEM TO BE SOLVED: To enhance precision of a reply to a query for finding a cause. PSOLUTION: This query response device 1 is provided with a document extraction part 6 for extracting a document related to a query sentence from a document group 11, a cause score calculation part 21 for calculating a first score showing a degree of possibility of including an expression indicating the cause in a reply candidate contained in the extracted document, using a corpus 12, a causal relation expression score calculating part 22 for calculating a second score showing a degree of possibility of including an expression indicating a causal relation between the query sentence and the reply candidate, using a cooccurrence probability table 13 storing cooccurrence probability of a cause result pair found from the corpus 12, a query reply association degree calculating part 23 for calculating a third score showing a degree of association between the query sentence and the reply candidate, and a reply candidate ranking part 8 for calculating a fourth score by integrating the first to third scores, and for outputting top 20 sentences of the fourth score as a reply to the query sentence. PCOPYRIGHT: (C)2009,JPO&INPIT