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(41)　A Proposal of Paraphrasing Method Using Inductive Learning for Dialogue System
　　　　Proceedings of FIRST INTERNATIONAL CONFERENCE ON INFORMATION TECHNOLOGY &
　　　　APPLICATIONS (ICITA 2002), pp.169-174, 2002-11

　In recent years, many methods of the paraphrasing are proposed since the technology of paraphrasing is able to apply
to various applications. The knowledge based methods for paraphrasing were proposed mainly. However, these methods
cannot deal with the situation which is not expected beforehand. And it is difficult to make clear the quantity and the kind of knowledge which should be prepared beforehand. Therefore, we propose the method which generates the paraphrased sentence by using Inductive Learning. This method is robust because the method can adapt to a user dynamically by acquiring paraphrasing rules from examples using Inductive Learning. We adapt this method to the question-answering system. In the question-answering system, it is one of the problems that it cannot answer the questions because they are the different expressions even if they are the same meaning. To solve the problem, the system generates the paraphrased sentences which are the same content and the different expression. By using generated paraphrased sentences in the matching process of the question-answering system, the system based on our proposed method realizes more efficient matching. And it can answer even the question which cannot be answered by the previous methods by using this system. We have constructed the paraphrasing system for the question-answering system on our proposed method, and showed
the effectiveness of it in this paper.