Question: who sings on the sunny side of life
[{'answer': 'Carter Family', 'provenance': [{'wikipedia_id': '23618846', 'title': 'Keep On the Sunny Side', 'start_paragraph_id': 1, 'start_character': 204, 'end_paragraph_id': 1, 'end_character': 217, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '23618846', 'title': 'Keep On the Sunny Side', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 316, 'bleu_score': 0.844360471920343, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1116940606908726579}, 'section': 'Section::::Abstract.'}]}]