| 摘要 |
PROBLEM TO BE SOLVED: To extract keywords matching a context from sentences.SOLUTION: A word extraction section 12 of a keyword extraction device 1 extracts words of a prescribed word class from sentence data. A word pair creation section 13 creates word pairs comprising the words extracted by the word extraction section 12. A similarity calculation section 14 calculates similarity between two words comprising a word pair, for each of the word pairs. A similarity aggregate part calculates a score of a word subject to the score calculation, with each of the words extracted by the word extraction section 12 subject to score calculation, for the word pairs including the words, on the basis of the similarity calculated by the similarity calculation part 14. A keyword selection part 17 selects keywords from the words extracted by the word extraction part 12 on the basis of the score of each word calculated by the similarity calculation part 15. |
