Question: when did they start putting vin numbers on cars
[{'answer': '1954', 'provenance': [{'wikipedia_id': '166136', 'title': 'Vehicle identification number', 'start_paragraph_id': 2, 'start_character': 24, 'end_paragraph_id': 2, 'end_character': 28, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '166136', 'title': 'Vehicle identification number', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 169, 'bleu_score': 0.7899756945192721, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4035521727310035112}, 'section': 'Section::::Abstract.'}]}]