Paper: Non-Factoid Japanese Question Answering through Passage Retrieval that Is Weighted Based on Types of Answers

ACL ID I08-2100
Title Non-Factoid Japanese Question Answering through Passage Retrieval that Is Weighted Based on Types of Answers
Venue International Joint Conference on Natural Language Processing
Session Main Conference
Year 2008
Authors

We constructed a system for answering non- factoid Japanese questions. We used var- ious methods of passage retrieval for the system. We extracted paragraphs based on terms from an input question and output them as the preferred answers. We classified the non-factoid questions into six categories. We used a particular method for each cate- gory. For example, we increased the scores of paragraphs including the word “reason” for questions including the word “why.” We participated at NTCIR-6 QAC-4, where our system obtained the most correct answers out of all the eight participating teams. The rate of accuracy was 0.77, which indicates that our methods were effective.