候选答案句抽取是问答系统中答案抽取的重要组成部分，其质量直接影响问答系统的性能。
Candidate answer sentence extraction is an important part of answer extraction, which directly effects question answering system's performance.
它的核心问题是：怎样才能抽取出包含正确答案的候选答案句。
Its core issue is how to extract the answer from the candidate answer sentences accurately.
它的核心问题是：怎样才能抽取出包含正确答案的候选答案句。
Its core issue is how to extract the answer from the candidate answer sentences accurately.
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