try sequence: string

README.md

@@ -17,11 +17,9 @@ dataset_info:
   - name: query
     dtype: string
   - name: positive
-    sequence:
-    - dtype: string
+    sequence: string
   - name: negative
-    sequence:
-    - dtype: string
+    sequence: string
   splits:
     - name: train
       num_bytes: 89609915