DEVICE AND METHOD FOR PRONOUN REWRITING AND PROGRAM USED FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To rewrite a pronoun more naturally by generating a pronoun rewriting rule consisting of morpheme and vocabulary properties expressed in a tree form from prepared pronoun rewriting example sentences. SOLUTION: This device comprises an input part which inputs a natural language sentence, a table memory which stores a dictionary table, a morpheme analyzing rule table, a property table, and an example sentence table, a morpheme analysis part which performs morpheme analysis of the inputted natural language sentence by referring to the dictionary table and morpheme analyzing rule table, a property extraction part which extracts morpheme and vocabulary properties defined in a property table according to the morpheme analysis result, a decision tree generation part which generates a decision tree of pronoun rewriting rules composed of the morpheme and vocabulary properties expressed in a tree form from the pronoun rewriting example sentences stored in the example sentence table, a rewriting rule determination part which determines a rewriting rule corresponding to each pronoun included in the natural language sentence according to the extracted morpheme and vocabulary properties by referring to the decision tree, and a pronoun rewriting part which rewrites the object pronoun according to the determined rewriting rule.