Know What You Don't Know: Unanswerable Questions for SQuAD

ACL 2018 Pranav RajpurkarRobin JiaPercy Liang

Extractive reading comprehension systems can often locate the correct answer to a question in a context document, but they also tend to make unreliable guesses on questions for which the correct answer is not stated in the context. Existing datasets either focus exclusively on answerable questions, or use automatically generated unanswerable questions that are easy to identify... (read more)

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