WWW 2008 / Refereed Track: Search - Applications April 21-25, 2008 Beijing, China Finding the Right Facts in the Crowd: Factoid Question Answering over Social Media College of Computing Georgia Institute of Technology Atlanta, GA 30332 Jiang Bian firstname.lastname@example.org Eugene Agichtein Math & Computer Science Department Emory University Atlanta, GA 30332 Yandong Liu email@example.com ABSTRACT Community Question Answering has emerged as a popular and e ective paradigm for a wide range of information needs. For example, to nd out an obscure piece of trivia, it is now possible and even very e ective to post a question on a popular community QA site such as Yahoo! Answers, and to rely on other users to provide answers, often within minutes. The importance of such community QA sites is magni ed as they create archives of millions of questions and hundreds of millions of answers, many of which are invaluable for the information needs of other searchers. However, to make this immense body of knowledge accessible, e ective answer retrieval is required. In particular, as any user can contribute an answer to a question, the majority of the content re ects personal, often unsubstantiated opinions. A ranking that combines both
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