Question: who sang the famous song strawberry fields forever
[{'answer': 'the Beatles', 'provenance': [{'wikipedia_id': '143174', 'title': 'Strawberry Fields Forever', 'start_paragraph_id': 1, 'start_character': 63, 'end_paragraph_id': 1, 'end_character': 74, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '143174', 'title': 'Strawberry Fields Forever', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 529, 'bleu_score': 0.8971845686984891, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9252795220191249308}, 'section': 'Section::::Abstract.'}]}]