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metric.py

@@ -103,6 +103,7 @@ class MetricRecipe(SequntialOperatorInitilizer):
             FromPredictionsAndOriginalData(),
             ApplyOperatorsField(
                 inputs_fields=["prediction", "references"],
+                fields_to_treat_as_list=["references"],
                 operators_field="postprocessors",
                 default_operators=["processors.to_string"],
             ),