QUESTION WORD WEIGHT CALCULATION APPARATUS, QUESTION ANSWER RETRIEVAL APPARATUS, QUESTION WORD WEIGHT CALCULATION METHOD, QUESTION ANSWER RETRIEVAL METHOD, PROGRAM AND RECORD MEDIUM

摘要

To reduce an influence of unnecessary words in an answer included in a question text of FAQ and perform FAQ retrieval with high accuracy even for unprotected FAQ.SOLUTION: A question word weight calculation apparatus 10 includes: a word weight calculation unit 14 for calculating a weight value indicating an importance in an answer of each word extracted from a question text using a plurality of words extracted from an answer text with respect to each pair of text pair groups by taking as input a text pair group composed of a pair of the question text and the answer text with respect to the question text; and an output unit 15 for outputting a question word weight table 16 for storing a weight value of each of the words calculated for the pair by the word weight calculation unit 14 for each of the pairs.SELECTED DRAWING: Figure 1