["task_categories:question-answering", "task_ids:extractive-qa", "annotations_creators:crowdsourced", "language_creators:crowdsourced", "language_creators:expert-generated", "multilinguality:monolingual", "source_datasets:original", "language:en", "license:cc-by-sa-3.0", "size_categories:10K<n<100K", "arxiv:1809.01494", "region:us", "conversational-qa"]