Question: who sang i dig rock and roll music
[{'answer': 'Peter , Paul and Mary', 'provenance': [{'wikipedia_id': '13545940', 'title': 'I Dig Rock and Roll Music', 'start_paragraph_id': 1, 'start_character': 70, 'end_paragraph_id': 1, 'end_character': 91, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'American folk group Peter , Paul and Mary'}, {'provenance': [{'wikipedia_id': '13545940', 'title': 'I Dig Rock and Roll Music', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 143, 'bleu_score': 0.929712191543383, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14910347425811165314}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '13545940', 'title': 'I Dig Rock and Roll Music', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['"I Dig Rock and Roll Music" is a 1967 song by the American folk group Peter, Paul and Mary, written by Paul Stookey, James Mason and Dave Dixon.', '"I Dig Rock and Roll Music" is a 1967 song by the American folk group Peter, Paul and Mary, written by Paul Stookey, James Mason and Dave Dixon.', '"I Dig Rock and Roll Music" is a 1967 song by the American folk group Peter, Paul and Mary, written by Paul Stookey, James Mason and Dave Dixon.']}}]}]