Question: who sang when i was mary's friend
[{'answer': 'Danny Wilson', 'provenance': [{'wikipedia_id': '28937937', 'title': "Mary's Prayer", 'start_paragraph_id': 1, 'start_character': 70, 'end_paragraph_id': 1, 'end_character': 82, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '28937937', 'title': "Mary's Prayer", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 254, 'bleu_score': 0.7839296699997941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10374199532788509497}, 'section': 'Section::::Abstract.'}]}]