Question: what was the first american city to host the olympic games
[{'answer': 'St. Louis', 'provenance': [{'wikipedia_id': '11015817', 'title': 'List of Olympic Games host cities', 'start_paragraph_id': 12, 'start_character': 56, 'end_paragraph_id': 12, 'end_character': 64, 'bleu_score': 1.0, 'section': 'Section::::Notes.\n'}]}]