| Summary: | Community Question Answering (CQA) services are internet services that enable users to ask and answer questions as well as to search through historical question-answer pairs. Commonly, these services provide more than just factual information. These question-answer pairs can be exploited for various purposes. For instance, analyzing opinions expressed in CQA services could be relatively useful to predict people’s opinion or preferences about a product or an event. Another possible application is an effective Question Answering (QA) system that is able to recognize different queries and give the correct answer to both factoid and opinion questions. To make these systems happen, question classification is essential.
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