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Community-based Question Answering (CQA) services have become a major venue for people's information seeking on the Web. However, many studies on CQA have focused on the prediction of the best answers for a given question. This paper looks into the formulation of effective questions in the context of CQA. In particular, we looked at effect of contextual factors appended to a basic question on the performance of submitted answers. This study analysed a total of 930 answers returned in responsedoi:10.1145/2009916.2010149 dblp:conf/sigir/SuzukiNJ11 fatcat:okpc3si2m5b7flagdqxlh4cebu