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README.md

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-license: cc-by-4.0
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+## License
+CC-BY-4.0
+
+## Source
+This dataset is derived from the [Open Problems – Single-Cell Perturbations](https://www.kaggle.com/competitions/open-problems-single-cell-perturbations) Kaggle competition, sponsored by Cellarity, Inc. and organized by [Open Problems in Single-Cell Analysis](https://openproblems.bio/).
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+The original competition data is licensed under [CC-BY-4.0](https://creativecommons.org/licenses/by/4.0/).
+
+## Citation
+If you use this dataset, please cite:
+- Luecken et al., 2025: Defining and benchmarking open problems in single-cell analysis. Nature Biotechnology.