Question: what's the highest mountain in the usa
[{'answer': 'Denali', 'provenance': [{'wikipedia_id': '16234974', 'title': 'List of the highest major summits of the United States', 'start_paragraph_id': 6, 'start_character': 27, 'end_paragraph_id': 6, 'end_character': 33, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]