Natural Questions: A Benchmark for Question Answering Research Tom Kwiatkowski author Jennimaria Palomaki author Olivia Redfield author Michael Collins author Ankur Parikh author Chris Alberti author Danielle Epstein author Illia Polosukhin author Jacob Devlin author Kenton Lee author Kristina Toutanova author Llion Jones author Matthew Kelcey author Ming-Wei Chang author Andrew M Dai author Jakob Uszkoreit author Quoc Le author Slav Petrov author 2019 text journal article Transactions of the Association for Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal kwiatkowski-etal-2019-natural 10.1162/tacl_a_00276 https://aclanthology.org/Q19-1026/ 2019 7 452 466