Question: who built the first practical motor car in the united states
[{'answer': 'Dr. J.W. Carhart', 'provenance': [{'wikipedia_id': '1983326', 'title': 'History of the automobile', 'start_paragraph_id': 19, 'start_character': 146, 'end_paragraph_id': 19, 'end_character': 162, 'bleu_score': 1.0, 'section': 'Section::::Power sources.:Steam-powered wheeled vehicles.:19th century.\n'}]}, {'provenance': [{'wikipedia_id': '1983326', 'title': 'History of the automobile', 'start_paragraph_id': 19, 'start_character': 0, 'end_paragraph_id': 19, 'end_character': 1070, 'bleu_score': 0.8722191311873521, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1034881913919320467}, 'section': 'Section::::Power sources.:Steam-powered wheeled vehicles.:19th century.\n'}]}]