Proper noun relationship estimation apparatus, method, and program

摘要

PROBLEM TO BE SOLVED: To estimate the relationship between proper nouns with good accuracy about a pair of proper nouns included in a document.SOLUTION: By a proper noun topic acquisition unit 22, according to a proper noun topic model, probability distribution is acquired which shows a relevance degree with a topic with respect to the proper noun. Then, by a proper noun similarity degree calculation unit 23, a proper noun similarity degree between a pair of proper nouns (X, Y) and a pair of proper nouns (A, B) of a teacher case is calculated. By a document topic acquisition unit 26, according to a document topic model, probability distribution is acquired which shows a relevance degree with the topic with respect to the document. By a document similarity degree calculation unit 27, the document similarity degree between an input document and the teacher case document is calculated. By a combination similarity degree calculation unit 28, based on the proper noun similarity degree and the document similarity degree, a combination similarity degree is calculated. By a similar case selection unit 29, a teacher case similar to the pair of the proper nouns (X, Y) is selected. By an output unit 3, the relationship of the pair of the poper nouns (X, Y) is output.