Natural Questions (NQ) is a large question-answering corpus released by Google Research. Questions are real anonymized, aggregated queries issued to the Google search engine. For each question, annotators are given a selected Wikipedia page (from the top search results) and label a long answer (typically a paragraph) and, if present, a short answer (one or more entities or spans); pages can also be labeled null when no answer is present. NQ is intended to require reading and comprehension of entire Wikipedia articles and is used for open-domain / reading-comprehension QA research. The public release contains on the order of a few hundred thousand examples (commonly cited: ~307k training examples) and is English-only. License: CC BY-SA 3.0.
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