Question: who sang the best day of my life
[{'answer': 'American Authors', 'provenance': [{'wikipedia_id': '41552347', 'title': 'Best Day of My Life', 'start_paragraph_id': 1, 'start_character': 58, 'end_paragraph_id': 1, 'end_character': 74, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '41552347', 'title': 'Best Day of My Life', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 530, 'bleu_score': 0.9521535476876201, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4760441275359533294}, 'section': 'Section::::Abstract.'}]}]