A data-driven approach to question subjectivity identification in community question answering
Refereed conference paper presented and published in conference proceedings


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摘要Automatic Subjective Question Answering (ASQA), which aims at answering users' subjective questions using summaries of multiple opinions, becomes increasingly important. One challenge of ASQA is that expected answers for subjective questions may not readily exist in the Web. The rising and popularity of Community Question Answering (CQA) sites, which provide platforms for people to post and answer questions, provides an alternative to ASQA. One important task of ASQA is question subjectivity identification, which identifies whether a user is asking a subjective question. Unfortunately, there has been little labeled training data available for this task. In this paper, we propose an approach to collect training data automatically by utilizing social signals in CQA sites without involving any manual labeling. Experimental results show that our data-driven approach achieves 9.37% relative improvement over the supervised approach using manually labeled data, and achieves 5.15% relative gain over a stateof-the-art semi-supervised approach. In addition, we propose several heuristic features for question subjectivity identification. By adding these features, we achieve 11.23% relative improvement over word n-gram feature under the same experimental setting. Copyright © 2012, Association for the Advancement of Artificial Intelligence. All rights reserved.
著者Zhou T.C., Si X., Chang E.Y., King I., Lyu M.R.
會議名稱26th AAAI Conference on Artificial Intelligence and the 24th Innovative Applications of Artificial Intelligence Conference, AAAI-12 / IAAI-12
會議開始日22.07.2012
會議完結日26.07.2012
會議地點Toronto, ON
會議國家/地區加拿大
出版年份2012
月份11
日期7
卷號1
頁次164 - 170
國際標準書號9781577355687
語言英式英語

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