Update README.md

README.md

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-# Dataset Card for "mc4_meta"
+# MC4-PT
+MC4-PT is the is the portuguese subset from [MC4](http://arxiv.org/abs/2010.11934).
+MC4 is a multilingual colossal, cleaned version of Common Crawl's web crawl corpus. Based on Common Crawl dataset: "https://commoncrawl.org".
 
-[More Information needed](https://github.com/huggingface/datasets/blob/main/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)
+This is the raw version. Deduplicated version is available [here](https://huggingface.co/datasets/eduagarcia/mc4-pt_dedup).