IDENTITY VECTOR CONSTRUCTION DEVICE, IDENTITY VECTOR CONSTRUCTION METHOD, PREDICATE SIMILARITY CALCULATION DEVICE, PREDICATE SIMILARITY CALCULATION METHOD AND PREDICATE SIMILARITY CALCULATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To exactly perform synonymous determination between predicates having surface layer character strings different from each other.SOLUTION: A morpheme analysis part performs a morphological analysis of a plurality of sentences. A modification analysis part performs a modification analysis between respective clauses of the plurality of sentences. A semantic label giving part specifies functional expression of a plurality of predicates belonging to the plurality of sentences and gives a semantic label represent the meaning thereof to each functional expression. An identity extraction part extracts a character string representing each functional expression of the plurality of predicates as a first identity on the basis of a morphological analysis result, extracts the semantic label given to each extracted functional expression as a second identity, and extracts a word having a modification relation to each of the plurality of predicates as a third identity. An identity vector construction part constructs an identity vector including the first, second and third identities as elements on the basis of each of the first, second and third identities extracted by identity extraction means about each of the plurality of predicates in each predicate about the plurality of predicates and a mutual information amount with the predicate.