Question: what kind of engines are in nascar cars
[{'answer': 'EFI V8', 'provenance': [{'wikipedia_id': '56571945', 'title': 'NASCAR Cup Series', 'start_paragraph_id': 70, 'start_character': 24, 'end_paragraph_id': 70, 'end_character': 30, 'bleu_score': 1.0, 'section': 'Section::::Cup cars.\n'}]}, {'provenance': [{'wikipedia_id': '56571945', 'title': 'NASCAR Cup Series', 'start_paragraph_id': 70, 'start_character': 0, 'end_paragraph_id': 70, 'end_character': 995, 'bleu_score': 0.7601674304171411, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3658301736897188510}, 'section': 'Section::::Cup cars.\n'}]}]