Question: number of books in the library of babel
[{'answer': '410', 'provenance': [{'wikipedia_id': '192303', 'title': 'The Library of Babel', 'start_paragraph_id': 1, 'start_character': 187, 'end_paragraph_id': 1, 'end_character': 190, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '192303', 'title': 'The Library of Babel', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 239, 'bleu_score': 0.684023500921051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1590203877088516348}, 'section': 'Section::::Abstract.'}]}]