Binary relation extraction apparatus, information retrieval apparatus, binary relation extraction processing method using a binary relation extraction processing, information retrieval processing method using a binary relation extraction process, the binary relation extraction processing program, and a binary relation extraction information retrieval processing program using the processing

摘要

Provided is a device capable of extracting a binary relation efficiently even for a complex problem. A solution-identity pair extraction unit (12) extracts the identify of a case, from a teacher data storage unit (11) stored with teacher data containing a case, in which a solution indicating what is to be extracted is given to the binary relation to appear in text data, thereby to create a combination of the identity set and the solution. A machine-learning unit (13) machine-learns it, by a predetermined machine-learning method, what solution an identity set takes, and stores the learning result information in a learning result storage unit (14). A candidate extraction unit (15) extracts a candidate for the binary relation from text data (2), and an identity extraction unit (16) extracts the set of identities of the candidates of the binary relation. On the basis of the learning result information, a solution estimation unit (17) estimates the feasibility degree for the solution of the case of the identity set of the candidates for the binary relation. From the estimation result, a binary relation extraction unit (18) extracts the candidate for the binary relation of an excellent estimation of a positive solution.