Question: how many lanes in a olympic swimming pool
[{'answer': '10', 'provenance': [{'wikipedia_id': '226434', 'title': 'Olympic-size swimming pool', 'start_paragraph_id': 6, 'start_character': 49, 'end_paragraph_id': 6, 'end_character': 51, 'bleu_score': 1.0, 'section': 'Section::::Specifications.\n'}]}]