add info in readme

README.md

@@ -37,4 +37,8 @@ dataset_info:
 ---
 # Dataset Card for "english_char_split"
 
-[More Information needed](https://github.com/huggingface/datasets/blob/main/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)
+This is a dataset of English words which have been tokenised by character.
+
+It was originally used to train a RoBERTa model from scratch on the masked language modelling task where during training, characters were randomly masked.
+
+This was ultimately used in an anomaly detection task where the embeddings from the trained model were used to detect non-English words - see full example [here](https://github.com/datasig-ac-uk/signature_applications/tree/master/anomaly_detection_language_dataset).