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| Overview of Question-Answering |
| ZHENG Shi-fu,LIU Ting,QIN Bing,LI Sheng |
| Information Retrieval Laboratory, Harbin Institute of Technology |
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Abstract Question-Answering is a hot research field in Natural Language Processing ,which includes many kinds of NLP technology. This paper introduces the current research status and the methods that are often used in Question-Answering. In general ,a Question-Answering system is made up of three parts : Question Analysis ,Information Retrieval and Answer Extraction. This paper describes the main functions of these three parts and the common approach used in these parts in detail. At last ,this paper introduces the evaluation of Question-Answering system.
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Received: 10 May 2002
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2002, Vol. 16 
