Question: what is the oldest living tree in america
[{'answer': 'Great Basin bristlecone pine', 'provenance': [{'wikipedia_id': '11337053', 'title': 'List of oldest trees', 'start_paragraph_id': 3, 'start_character': 68, 'end_paragraph_id': 3, 'end_character': 96, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]