Question: who developed a machine which could be run by petrol
[{'answer': 'Nikolaus August Otto', 'provenance': [{'wikipedia_id': '166194', 'title': 'Petrol engine', 'start_paragraph_id': 4, 'start_character': 66, 'end_paragraph_id': 4, 'end_character': 86, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}]