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README.md

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-license: odc-by
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+---
+license: odc-by
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+A cleaned, deduplicated, and decontaminated version of [C4](https://huggingface.co/datasets/allenai/c4) (noblocklist).
+
+### Cleaning
+
+Documents with non-English content, advertisements, large chunks of repetitions, and other low-quality content are heuristically removed.
+
+### Deduplication
+
+This dataset has been glabally deduplicated based on exact matches, and cross-deduplicated with [OpenWebText2](https://huggingface.co/datasets/Geralt-Targaryen/openwebtext2) and [CC-News](https://huggingface.co/datasets/Geralt-Targaryen/CC-News).
+
+### Decontamination
+
+More than 25K documents are removed during decontamination with respect to the following benchmarks based on n-gram overlap:
+
+- GLUE (dev set of SST-2, CoLA, QQP, WNLI, RTE, QNLI, MNLI; test set of MPRC)
+- SIQA, PIQA, QASC, CSQA, HellaSWAG (all dev set)
+- CONLL 2003
+- BLIMP
+- [MAIN](https://main.leibniz-zas.de/en/main-materials/main-materials/)
+- BoolQ (dev set)
+- WinoGrande (dev set)
+- ANLI (test set)
+- ARC easy and challenge (test set)
+- RACE middle and high (test set)
+- MMLU (dev, val, and test sets)
+- MATH, GSM8K (test set)
+- HumanEval (test set)
+- MBPP (all 974 questions)
+- GPQA (diamond)
+
+
+### Dataset Statistics
+
+Number of samples: 301,031,364.
+
+Size of downloaded parquet files: 484G.