Question: who sets automobile efficiency standards in the united states
[{'answer': 'National Highway Traffic Safety Administration', 'provenance': [{'wikipedia_id': '440246', 'title': 'Corporate average fuel economy', 'start_paragraph_id': 1, 'start_character': 402, 'end_paragraph_id': 1, 'end_character': 448, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '440246', 'title': 'Corporate average fuel economy', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 754, 'bleu_score': 0.9826823455989031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13887375601529207934}, 'section': 'Section::::Overview.\n'}]}]