Question: who wrote the song imagine by the beatles
[{'answer': 'John Lennon', 'provenance': [{'wikipedia_id': '18960141', 'title': 'Imagine (John Lennon song)', 'start_paragraph_id': 0, 'start_character': 9, 'end_paragraph_id': 0, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18960141', 'title': 'Imagine (John Lennon song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 365, 'bleu_score': 0.9405915740399611, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18269037018566601563}, 'section': 'Section::::Abstract.'}]}]