Update README.md

README.md

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-Edit this `README.md` markdown file to author your organization card.
+# The Stack v2 Training Data
+
+This organization contains the full datasets used to train StarCoder2:
+
+- `the-stack-v2-train-full`: contains the training data with 600+ programming languages used to train StarCoder2-15B  with the files concatenated per repository
+- `the-stack-v2-train-full-files`: same as `the-stack-v2-train-full` but without repository concatenation which makes filtering files or licenses easier
+- `the-stack-v2-train-smol`: contains the training data with 17 programming languages used to train StarCoder2-3B and 7B  with the files concatenated per repository
+- `the-stack-v2-train-smol-files`: same as `the-stack-v2-train-smol` but without repository concatenation which makes filtering files or licenses easier