Question: where did the roman spectators watch chariot races
[{'answer': 'a circus', 'provenance': [{'wikipedia_id': '265965', 'title': 'Chariot racing', 'start_paragraph_id': 16, 'start_character': 54, 'end_paragraph_id': 16, 'end_character': 62, 'bleu_score': 1.0, 'section': 'Section::::Roman era.\n'}]}, {'provenance': [{'wikipedia_id': '265965', 'title': 'Chariot racing', 'start_paragraph_id': 16, 'start_character': 0, 'end_paragraph_id': 16, 'end_character': 1156, 'bleu_score': 0.649953261586765, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5684643355879702476}, 'section': 'Section::::Roman era.\n'}]}]