Update README.md

This is a multi-domain German-English parallel data introduced in [Aharoni and Goldberg (2020)](https://aclanthology.org/2020.acl-main.692/). It is a new data split created that avoids duplicate examples and leakage from the train split to the dev/test splits. The original multi-domain data first appeared in [Koehn and Knowles (2017)](https://www.aclweb.org/anthology/W17-3204/) and consists of five datasets available in the [Opus website](http://opus.nlpl.eu/).

README.md

@@ -17,6 +17,15 @@ dataset_info:
     num_examples: 2000
   download_size: 35861692
   dataset_size: 54001188
+task_categories:
+- translation
+language:
+- en
+- de
+tags:
+- medical
+size_categories:
+- 100K<n<1M
 ---
 # Dataset Card for "opus-medical-en-de"