SUMMARY SENTENCE CALCULATION DEVICE, SUMMARY SENTENCE CALCULATION METHOD, AND PROGRAM

摘要

This summary sentence calculation device is provided with an input means for inputting a collection of sentences, and a summary sentence calculation means for calculating a collection of summary sentences from the aforementioned collection of sentences. The summary sentence calculation means selects a prescribed sentence from the collection of sentences, and calculates how much, if the prescribed sentence were added to a new summary sentence collection, the coverage ratio of the summary sentence collection after addition would increase relative to the coverage ratio of the summary sentence collection prior to the addition. If the increase would be less than a first threshold value, the summary sentence calculation means outputs the summary sentence collection prior to the addition and ends processing, and, if the increase would be greater than or equal to the first threshold value, then, until the processing is ended, the summary sentence calculation means repeats processing in which the summary sentence collection after the addition is made the new summary sentence collection.