Question: when were handguns made illegal in the uk
[{'answer': '1997', 'provenance': [{'wikipedia_id': '450950', 'title': 'Firearms regulation in the United Kingdom', 'start_paragraph_id': 13, 'start_character': 4, 'end_paragraph_id': 13, 'end_character': 8, 'bleu_score': 1.0, 'section': 'Section::::Legal classification.:Pistols.\n'}]}, {'provenance': [{'wikipedia_id': '450950', 'title': 'Firearms regulation in the United Kingdom', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 636, 'bleu_score': 0.7566285397119651, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5536267604558084121}, 'section': 'Section::::Legal classification.:Pistols.\n'}]}]