Question: how many tires does a 18 wheeler have
[{'answer': 'eighteen', 'provenance': [{'wikipedia_id': '29381', 'title': 'Semi-trailer truck', 'start_paragraph_id': 2, 'start_character': 141, 'end_paragraph_id': 2, 'end_character': 149, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '29381', 'title': 'Semi-trailer truck', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 669, 'bleu_score': 0.9625181433061291, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 245983329099292374}, 'section': 'Section::::Regional configurations.:North America.\n'}]}]