update

doc_retrieve_metrics.py

@@ -71,8 +71,8 @@ class DocRetrieveMetrics(evaluate.Metric):
             inputs_description=_KWARGS_DESCRIPTION,
             # This defines the format of each prediction and reference
             features=datasets.Features({
-                'predictions': datasets.Value('int64'),
-                'references': datasets.Value('int64'),
+                "predictions": datasets.Sequence(datasets.Sequence(datasets.Value("string"))),
+                "references": datasets.Sequence(datasets.Sequence(datasets.Value("string"))),
             }),
             # Homepage of the module for documentation
             homepage="http://module.homepage",