Question: what is the volcano in yellowstone national park called
[{'answer': 'The Yellowstone Caldera', 'provenance': [{'wikipedia_id': '379647', 'title': 'Yellowstone Caldera', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '379647', 'title': 'Yellowstone Caldera', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 333, 'bleu_score': 0.9645876452711911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16069651649272655317}, 'section': 'Section::::Abstract.'}]}]