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Title:
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NEW APPROACH IN QUESTION ANSWERING SYSTEMS, USING THE GRAMMATICAL STRUCTURE |
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Author(s):
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Ahad Niknia |
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ISBN:
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978-972-8939-67-0 |
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Editors:
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Piet Kommers and Pedro Isaías |
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Year:
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2012 |
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Edition:
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Single |
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Keywords:
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Question Answering System, Answer Extraction, Answer Patterns, Natural Language Processing, Information Retrieval |
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Type:
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Full Paper |
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First Page:
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383 |
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Last Page:
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390 |
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Language:
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English |
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Cover:
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Full Contents:
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click to dowload 
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Paper Abstract:
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An Open Domain Question Answering system is going to be introduced in this paper. This system is designed to answer the wh-questions that posed in English, based on the answer patterns technique. Answering the given questions is based on some features. Some of these features are based on advanced IR methods and some others use the new methods. When a question is given to the system, at first, the system builds its grammatical structure tree using a POS-Tagger system. After that the system uses the proposed reduced tags set and answer table to associate suitable answers to the given question. This association based on the grammatical structures of the questions and appropriate answers. Then the results would be given to the special search engine based on new indexing system to extracts the candidate answers. Each candidate answer has an importance value associated. These candidate answers and the associated values are given to the ranking system. The proposed ranking system uses a special formula based on advanced IR techniques and grammatical analyses. The ranking module sorts the candidate answers based on the resulted value of the formula in decreasing order. The answers list for the given question consists of the special range of the produced ordered list. In this step, defined threshold of the most scored sentences would be selected as the answering list. The system would be evaluated considering the mentioned answering list and the results shows good outcome of the system. |
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