Question: when was the voting age changed to 18 uk
[{'answer': '1969', 'provenance': [{'wikipedia_id': '630522', 'title': 'Voting age', 'start_paragraph_id': 5, 'start_character': 393, 'end_paragraph_id': 5, 'end_character': 397, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '630522', 'title': 'Voting age', 'start_paragraph_id': 35, 'start_character': 0, 'end_paragraph_id': 35, 'end_character': 397, 'bleu_score': 0.9712154609069981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12526140456074396542}, 'section': 'Section::::Debate on lowering the voting age to 16.:United Kingdom.\n'}]}]