SQuAD (The Stanford Question Answering Dataset) is a reading dataset based on questions asked by the public in Wikipedia. The answer to each question comes from a piece of text in the corresponding reading paragraph, totaling more than 100,000 question-answer pairs in more than 500 articles. SQuAD was released by Stanford University in 2018, and the related paper is "Know What You Don't Know: Unanswerable Questions for SQuAD".