Update dataset card with detailed description

README.md

@@ -7,16 +7,16 @@ dataset_info:
     dtype: string
   splits:
   - name: train
-    num_bytes: 1889087
+    num_bytes: 1415916
     num_examples: 1859
   - name: valid
-    num_bytes: 1846774
+    num_bytes: 1440885
     num_examples: 1860
   - name: test
-    num_bytes: 1907032
+    num_bytes: 1421070
     num_examples: 1849
-  download_size: 1533748
-  dataset_size: 5642893
+  download_size: 1526939
+  dataset_size: 4277871
 configs:
 - config_name: default
   data_files:
@@ -26,4 +26,4 @@ configs:
     path: data/valid-*
   - split: test
     path: data/test-*
----
+---