PREDICATE-ARGUMENT STRUCTURE EXTRACTION DEVICE, METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To extract a predicate-argument structure from a pair of a question sentence and an answer sentence with high accuracy.SOLUTION: A question request expression identification unit 32 identifies a question expression or a request expression included in a question sentence. A predicate-argument information extraction unit 34 extracts a predicate included in the question sentence and/or a case element corresponding to the predicate as predicate-argument information in accordance with a set of predicate-argument information extraction rules. An answer expression extraction unit 36 extracts an expression including a noun and a proper noun included in the answer sentence and/or an affirmative/negative expression as an answer expression. A predicate-argument structure generation unit 38 generates a predicate-argument structure on the basis of the predicate-argument information and the answer expression.SELECTED DRAWING: Figure 1