Update README.md

README.md

@@ -1,4 +1,5 @@
 ---
+license: cc-by-4.0
 language:
 - en
 task_categories:
@@ -244,3 +245,31 @@ def build_prompt(question, steps):
   solution-level signal.
 * **Step boundaries follow blank lines** in the generator's output. Where a model wrote a numbered list on
   consecutive lines, several logical steps can end up inside one step string.
+
+## Source Data and Attribution
+
+We sourced GSM8K from OpenAI's official repository:
+<https://huggingface.co/datasets/openai/gsm8k>. This dataset is protected by the
+[MIT](https://github.com/openai/grade-school-math/blob/master/LICENSE) license.
+
+We sourced MATH from <https://huggingface.co/datasets/qwedsacf/competition_math>,
+a mirror of the original release by Hendrycks et al. This dataset is protected by
+the [MIT](https://github.com/hendrycks/math/blob/main/LICENSE) license.
+
+Please defer to the GSM8K and MATH dataset cards for further details on their
+collection and annotation process.
+
+Reasoning traces were generated with
+[Mathstral-7B-v0.1](https://huggingface.co/mistralai/Mathstral-7B-v0.1) and
+[Mistral-7B-Instruct-v0.3](https://huggingface.co/mistralai/Mistral-7B-Instruct-v0.3);
+hallucination annotations were produced with
+[gpt-oss-120b](https://huggingface.co/openai/gpt-oss-120b). All three are released
+under the Apache 2.0 License, and gpt-oss-120b additionally carries the gpt-oss
+usage policy. None of these licenses restrict the redistribution of model outputs.
+
+## Additional Information
+
+### Licensing Information
+
+The reasoning traces and hallucination annotations we provide are licensed under
+the [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/legalcode) license.