Question: who plays maleficent in once upon a time
[{'answer': 'Kristin Bauer van Straten', 'provenance': [{'wikipedia_id': '10871046', 'title': 'Kristin Bauer van Straten', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 25, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '10871046', 'title': 'Kristin Bauer van Straten', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 279, 'bleu_score': 0.7689470598488071, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15117631564124368158}, 'section': 'Section::::Abstract.'}]}]