TOPIC EXTRACTION DEVICE, TOPIC EXTRACTION METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a topic extraction device, a topic extraction method and a program that can extract a more appropriate topic from given documents.

SOLUTION: Expressions matching topic patterns defining potentially topical expressions are extracted as topic candidates from each document in a document group. According to scores depending on scores given to the respective topic patterns and importance of words in the topic candidates, topic scores indicating topic appearance of the topic candidates are calculated. The topic candidate of the highest topic score calculated is selected as a topic of the document group.

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