Question: how many members of the beatles are there
[{'answer': 'Four', 'provenance': [{'wikipedia_id': '29812', 'title': 'The Beatles', 'start_paragraph_id': 2, 'start_character': 723, 'end_paragraph_id': 2, 'end_character': 727, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]