Question: who played the good witch in oz the great and powerful
[{'answer': 'Mila Kunis', 'provenance': [{'wikipedia_id': '32427039', 'title': 'Oz the Great and Powerful', 'start_paragraph_id': 1, 'start_character': 395, 'end_paragraph_id': 1, 'end_character': 405, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '32427039', 'title': 'Oz the Great and Powerful', 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 409, 'bleu_score': 0.9338603241255111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17435638416100795686}, 'section': 'Section::::Cast.\n'}]}]