["task_categories:question-answering", "task_ids:extractive-qa", "annotations_creators:expert-generated", "language_creators:found", "multilinguality:monolingual", "source_datasets:extended|natural_questions", "language:en", "license:unknown", "size_categories:1K<n<10K", "arxiv:2009.06354", "region:us", "explanations-in-question-answering"]