task_categories:other language:en license:cc0-1.0 size_categories:1K<n<10K format:parquet format:optimized-parquet modality:image modality:text library:datasets library:dask library:polars library:mlcroissant region:us ufo uap government-documents public-domain declassified department-of-war pdf-to-image document-images historical-records national-archives freedom-of-information pursue release-01 ml-intern