Update README.md

README.md

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-license: cc0-1.0
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+---
+license: cc-by-sa-3.0
+---
+
+## Dataset Description
+
+You are provided with a large number of Wikipedia comments which have been labeled by human raters for toxic behavior. The types of toxicity are:
+
+- `toxic`
+- `severe_toxic`
+- `obscene`
+- `threat`
+- `insult`
+- `identity_hate`
+
+You must create a model which predicts a probability of each type of toxicity for each comment.
+
+### File descriptions
+
+- **train.csv** - the training set, contains comments with their binary labels
+- **test.csv** - the test set, you must predict the toxicity probabilities for these comments. To deter hand labeling, the test set contains some comments which are not included in scoring.
+- **sample_submission.csv** - a sample submission file in the correct format
+- **test_labels.csv** - labels for the test data; value of -1 indicates it was not used for scoring; (Note: file added after competition close!)
+
+### Usage
+
+The dataset under [CC0](https://creativecommons.org/public-domain/cc0/), with the underlying comment text being governed by [Wikipedia's CC-SA-3.0](https://creativecommons.org/licenses/by-sa/3.0/)
+
+## License
+
+Redistributed by @thesofakillers on huggingface as permitted under the CC0 license. 
+The comment text in this dataset is sourced from Wikipedia articles, available under the
+[Creative Commons Attribution-ShareAlike 3.0](https://creativecommons.org/licenses/by-sa/3.0/) license.