Question: who sings it will be let it be
[{'answer': 'the Beatles', 'provenance': [{'wikipedia_id': '3978944', 'title': 'Let It Be', 'start_paragraph_id': 4, 'start_character': 55, 'end_paragraph_id': 4, 'end_character': 66, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]