Question: who plays cora in once upon a time
[{'answer': 'Barbara Hershey', 'provenance': [{'wikipedia_id': '887152', 'title': 'Barbara Hershey', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '887152', 'title': 'Barbara Hershey', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 477, 'bleu_score': 0.9451526628827591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17368049976961941828}, 'section': 'Section::::Abstract.'}]}]