INFORMATION EXTRACTION APPARATUS, INFORMATION EXTRACTION METHOD, AND INFORMATION EXTRACTION PROGRAM

摘要

PROBLEM TO BE SOLVED: To accurately extract information on a related category from a document.SOLUTION: An event extraction model learning function 50 calculates a feature vector representing features of category combinations for combinations of candidates of categories stored in an extraction candidate DB 20, calculates a loss for a collect solution for a category combination which has the maximum score calculated by the feature vector and an extraction model, and updates the event extraction model when the loss is equal to or less than a predetermined value, to prepare a more proper event extraction model. An event extraction function 90 acquires a category combination having the maximum score calculated by the feature vector of the category combination and the event extraction model prepared by the event extraction model learning function 50, for combinations of candidates of categories stored in a prediction extraction candidate DB 80.