apply helper to references

isco_hierarchical_accuracy.py

@@ -274,6 +274,7 @@ class ISCO_Hierarchical_Accuracy(evaluate.Metric):
         # Convert the inputs to strings
         if len(predictions[0]) > 4:
             predictions = [self._extract_isco_code(p) for p in predictions]
+            references = [self._extract_isco_code(r) for r in references]
         predictions = [str(p) for p in predictions]
         references = [str(r) for r in references]