Question: who wrote the song mary did you know
[{'answer': 'Mark Lowry', 'provenance': [{'wikipedia_id': '2859825', 'title': 'Mary, Did You Know?', 'start_paragraph_id': 1, 'start_character': 99, 'end_paragraph_id': 1, 'end_character': 109, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Buddy Greene', 'provenance': [{'wikipedia_id': '2859825', 'title': 'Mary, Did You Know?', 'start_paragraph_id': 1, 'start_character': 140, 'end_paragraph_id': 1, 'end_character': 152, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2859825', 'title': 'Mary, Did You Know?', 'start_paragraph_id': 1, 'start_character': 74, 'end_paragraph_id': 1, 'end_character': 613, 'bleu_score': 0.704900657049042, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3411080721903990856}, 'section': 'Section::::Abstract.'}]}]