Question: what is the attendance of the indianapolis 500
[{'answer': 'approximately 300,000', 'provenance': [{'wikipedia_id': '159018', 'title': 'Indianapolis 500', 'start_paragraph_id': 2, 'start_character': 432, 'end_paragraph_id': 2, 'end_character': 453, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '159018', 'title': 'Indianapolis 500', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 452, 'bleu_score': 0.972407137066537, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15458412165177191295}, 'section': 'Section::::Abstract.'}]}]