add dataset_info in dataset metadata

README.md

@@ -33,6 +33,24 @@ train-eval-index:
     name: Rouge
 tags:
 - headline-generation
+dataset_info:
+  features:
+  - name: document
+    dtype: string
+  - name: summary
+    dtype: string
+  splits:
+  - name: test
+    num_bytes: 450782
+    num_examples: 1951
+  - name: train
+    num_bytes: 915249388
+    num_examples: 3803957
+  - name: validation
+    num_bytes: 45767096
+    num_examples: 189651
+  download_size: 578402958
+  dataset_size: 961467266
 ---
 
 # Dataset Card for Gigaword