Update README.md

README.md

@@ -34,7 +34,7 @@ For more details, read the paper:
 ### Model Sources
 
 - **Repository:** https://github.com/allenai/open-instruct
-- **Dataset:** Data used to train this model can be found [here](https://huggingface.co/datasets/allenai/tulu-2.5-preference-data).
+- **Dataset:** Data used to train this model can be found [here](https://huggingface.co/datasets/allenai/tulu-2.5-preference-data) - specifically the `ultrafeedback_mean_aspects` split.
 - **Model Family:** The collection of related models can be found [here](https://huggingface.co/collections/allenai/tulu-v25-suite-66676520fd578080e126f618).
 
 ## Input Format