Update README.md

README.md

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 # Dataset Card for "coco-30-val-2014"
 
-[More Information needed](https://github.com/huggingface/datasets/blob/main/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)
+This is 30k randomly sampled image-captioned pairs from the COCO 2014 `val` split. This is useful for image generation benchmarks (FID, CLIPScore, etc.).
+
+Refer to the gist to know how the dataset was created: https://gist.github.com/sayakpaul/0c4435a1df6eb6193f824f9198cabaa5.