Question: what is a symbol of the united states
[{'answer': 'Flag of the United States', 'provenance': [{'wikipedia_id': '2010670', 'title': 'National symbols of the United States', 'start_paragraph_id': 0, 'start_character': 9, 'end_paragraph_id': 0, 'end_character': 37, 'bleu_score': 0.668740304976422, 'section': 'Section::::Abstract.'}]}]