Question: when was the first cctv camera used in the uk
[{'answer': '1970s', 'provenance': [{'wikipedia_id': '87179', 'title': 'Closed-circuit television', 'start_paragraph_id': 9, 'start_character': 562, 'end_paragraph_id': 9, 'end_character': 567, 'bleu_score': 1.0, 'section': 'Section::::History.:Technology.\n'}]}]