Question: how many songs did lennon and mccartney wrote together
[{'answer': 'approximately 180', 'provenance': [{'wikipedia_id': '1056165', 'title': 'Lennon–McCartney', 'start_paragraph_id': 1, 'start_character': 439, 'end_paragraph_id': 1, 'end_character': 456, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1056165', 'title': 'Lennon–McCartney', 'start_paragraph_id': 1, 'start_character': 44, 'end_paragraph_id': 1, 'end_character': 573, 'bleu_score': 0.728047982130111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1989591451826008309}, 'section': 'Section::::Abstract.'}]}]