Fix missing tags in dataset cards (#4833)

Commit from https://github.com/huggingface/datasets/commit/c6434a26d696a52997f9a670a30c537d962f91e4

README.md

@@ -1,6 +1,22 @@
 ---
+annotations_creators:
+- crowdsourced
+language_creators:
+- crowdsourced
 language:
 - en
+license:
+- unknown
+multilinguality:
+- monolingual
+size_categories:
+- 10K<n<100K
+source_datasets:
+- original
+task_categories:
+- text2text-generation
+task_ids:
+- open-domain-abstractive-qa
 paperswithcode_id: break
 pretty_name: BREAK
 ---
@@ -250,10 +266,8 @@ The data fields are the same among all splits.
   journal={Transactions of the Association for Computational Linguistics},
   year={2020},
 }
-
 ```
 
-
 ### Contributions
 
 Thanks to [@patrickvonplaten](https://github.com/patrickvonplaten), [@lewtun](https://github.com/lewtun), [@thomwolf](https://github.com/thomwolf) for adding this dataset.