Question: who plays mrs medlock in the secret garden
[{'answer': 'Dame Maggie Smith', 'provenance': [{'wikipedia_id': '410873', 'title': 'The Secret Garden', 'start_paragraph_id': 22, 'start_character': 223, 'end_paragraph_id': 22, 'end_character': 240, 'bleu_score': 1.0, 'section': 'Section::::Adaptations.:Film.\n'}]}, {'provenance': [{'wikipedia_id': '410873', 'title': 'The Secret Garden', 'start_paragraph_id': 22, 'start_character': 0, 'end_paragraph_id': 22, 'end_character': 305, 'bleu_score': 0.959574895300321, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9779995660791702855}, 'section': 'Section::::Adaptations.:Film.\n'}]}]