Question: what age do you need to be to buy a bb gun
[{'answer': '18', 'provenance': [{'wikipedia_id': '4644691', 'title': 'Legal issues in airsoft', 'start_paragraph_id': 25, 'start_character': 76, 'end_paragraph_id': 25, 'end_character': 78, 'bleu_score': 1.0, 'section': 'Section::::Argentina.\n'}]}, {'provenance': [{'wikipedia_id': '4644691', 'title': 'Legal issues in airsoft', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14773499792305419064}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4644691', 'title': 'Legal issues in airsoft', 'start_paragraph_id': 274, 'start_character': 0, 'end_paragraph_id': 274, 'end_character': 831, 'bleu_score': 0.9860618656782161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14773499792305419064}, 'section': 'Section::::United States.\n'}]}, {'provenance': [{'wikipedia_id': '1841220', 'title': 'Firearms regulation in Switzerland', 'section': 'Section::::Regulation.:Acquisition.:Buying guns.\n', 'start_paragraph_id': 35, 'end_paragraph_id': 35, 'meta': {'evidence_span': ['Swiss citizens and foreigners with a C permit over the age of 18 who are not under a curator', "Swiss citizens and foreigners with a C permit over the age of 18 who are not under a curator nor identified as being a danger for themselves or others, and who don't have a criminal record with a conviction for a violent crime or of several convictions as long as they haven't been written out can request such a permit."]}}]}, {'provenance': [{'wikipedia_id': '4644691', 'title': 'Legal issues in airsoft', 'section': 'Section::::Argentina.\n', 'start_paragraph_id': 25, 'end_paragraph_id': 25, 'meta': {'evidence_span': ['In Argentina, Airsoft guns can be bought and used by anyone over the age of 18, however the import, sale and manufacture of replica guns requires a permit by federal law 26.216 (edited March 2018)', 'however the import, sale and manufacture of replica guns requires a permit by federal law 26.216 (edited March 2018)', 'In Argentina, Airsoft guns can be bought and used by anyone over the age of 18, however the import, sale and manufacture of replica guns requires a permit by federal law 26.216 (edited March 2018)\rhighlight sentence(s) containing evidence, not only the answer']}}]}]