Add dataset card

Upload Parquet batch 4500–4999

Upload Parquet batch 4000–4499

Upload Parquet batch 3500–3999

Upload Parquet batch 3000–3499

Upload Parquet batch 2500–2999

Upload Parquet batch 2000–2499

Upload Parquet batch 1500–1999

Upload Parquet batch 1000–1499

Upload Parquet batch 500–999

Upload Parquet batch 0–499

Clear old data before re-upload

Upload dataset batch 4500-5000

Upload dataset batch 4000-4500

Upload dataset batch 3500-4000

Upload dataset batch 3000-3500

Upload dataset batch 2500-3000

Upload dataset batch 2000-2500

Upload dataset batch 1500-2000

Upload dataset batch 1000-1500

Upload dataset batch 500-1000

Upload dataset batch 0-500

Update README.md

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