Question: who wrote the song the greatest man i never knew
[{'answer': 'Richard Leigh', 'provenance': [{'wikipedia_id': '20764182', 'title': 'The Greatest Man I Never Knew', 'start_paragraph_id': 1, 'start_character': 53, 'end_paragraph_id': 1, 'end_character': 66, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Layng Martine , Jr.', 'provenance': [{'wikipedia_id': '20764182', 'title': 'The Greatest Man I Never Knew', 'start_paragraph_id': 1, 'start_character': 71, 'end_paragraph_id': 1, 'end_character': 90, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '20764182', 'title': 'The Greatest Man I Never Knew', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 533, 'bleu_score': 0.867827607110321, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17229233454854224696}, 'section': 'Section::::Abstract.'}]}]