Question: what is the tallest dam in the united states of america
[{'answer': 'Oroville Dam in northern California', 'provenance': [{'wikipedia_id': '21855664', 'title': 'List of tallest dams in the United States', 'start_paragraph_id': 2, 'start_character': 121, 'end_paragraph_id': 2, 'end_character': 156, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '21855664', 'title': 'List of tallest dams in the United States', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 570, 'bleu_score': 0.8796877939315181, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8170036584640038726}, 'section': 'Section::::Abstract.'}]}]