System and method for question answering document retrieval

摘要

A retrieval device ( 22 ) retrieves associated documents on the basis of a keyword contained in a question serving as a retrieval request in question form from a user. The retrieval device ( 22 ) extracts descriptions associated with the keyword and contained in the retrieved documents as first summaries. A summary extraction unit ( 232 ) extracts descriptions corresponding to answers matching the question type of the question determined by a question type determination unit ( 231 ) as second summaries from original-document data which forms documents indicated by the document retrieval results. The original-document data is included in original-document data stored in an original-document database and forming each document as a retrieval target. An interface ( 21 ) displays the document retrieval results and the list of the extracted second summaries on a display device. The document retrieval results include the list of the extracted first summaries.