Question: when was the first bullet proof vest invented
[{'answer': '1893', 'provenance': [{'wikipedia_id': '3065290', 'title': 'Casimir Zeglen', 'start_paragraph_id': 2, 'start_character': 3, 'end_paragraph_id': 2, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3065290', 'title': 'Casimir Zeglen', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 402, 'bleu_score': 0.5770364239577881, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8639715564422342612}, 'section': 'Section::::Abstract.'}]}]