Update README.md

README.md

@@ -12,4 +12,8 @@ dataset_info:
 ---
 # Dataset Card for "chunked-wikipedia20220301en-bookcorpusopen"
 
-[More Information needed](https://github.com/huggingface/datasets/blob/main/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)
+
+This dataset combines [wikipedia20220301.en](https://huggingface.co/datasets/wikipedia) and [bookcorpusopen](https://huggingface.co/datasets/bookcorpusopen),
+and splits the data into smaller chunks, of size ~820 chars (such that each item will be at least ~128 tokens). 
+The logic only splits on spaces, so the chunks are likely to be slightly larger than 820 chars. The dataset has been normalized into lower case, removing accents a non-english characters.
+Items with less than 200 chars are removed, or more than 1000.