Question: when did seat belts start being put in cars
[{'answer': 'in 1949', 'provenance': [{'wikipedia_id': '51474', 'title': 'Seat belt', 'start_paragraph_id': 8, 'start_character': 33, 'end_paragraph_id': 8, 'end_character': 40, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '51474', 'title': 'Seat belt', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 301, 'bleu_score': 0.9611463610973231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16801420117418069190}, 'section': 'Section::::History.\n'}]}]