Question: who sang for mother superior in the sound of music
[{'answer': 'Margery McKay', 'provenance': [{'wikipedia_id': '859179', 'title': 'Peggy Wood', 'start_paragraph_id': 12, 'start_character': 389, 'end_paragraph_id': 12, 'end_character': 402, 'bleu_score': 1.0, 'section': 'Section::::Last appearances.\n'}]}, {'provenance': [{'wikipedia_id': '859179', 'title': 'Peggy Wood', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 584, 'bleu_score': 0.980097014099621, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8133054888079854554}, 'section': 'Section::::Last appearances.\n'}]}]