Question: who produced the first motor that run on ac
[{'answer': 'Walter Baily', 'provenance': [{'wikipedia_id': '5578272', 'title': 'AC motor', 'start_paragraph_id': 9, 'start_character': 258, 'end_paragraph_id': 9, 'end_character': 270, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '5578272', 'title': 'AC motor', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 1029, 'bleu_score': 0.9881300380564421, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6448336847951501552}, 'section': 'Section::::History.\n'}]}]