task_categories:question-answering task_ids:open-domain-qa annotations_creators:crowdsourced language_creators:expert-generated multilinguality:monolingual source_datasets:extended|ambig_qa language:en license:apache-2.0 size_categories:1K<n<10K format:parquet modality:text library:datasets library:pandas library:mlcroissant library:polars arxiv:2204.06092 region:us factoid questions long-form answers