Question: what is the most dangerous snake in the united states
[{'answer': 'eastern and western diamondback rattlesnake'}, {'provenance': [{'wikipedia_id': '15255176', 'title': 'List of fatal snake bites in the United States', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 421, 'bleu_score': 0.692448287921653, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3913155118174707005}, 'section': 'Section::::Snake species.\n'}]}]