Question: when did commercial radio start in the uk
[{'answer': '1973', 'provenance': [{'wikipedia_id': '711881', 'title': 'Independent Local Radio', 'start_paragraph_id': 9, 'start_character': 115, 'end_paragraph_id': 9, 'end_character': 119, 'bleu_score': 1.0, 'section': 'Section::::History.:Development of ILR.\n'}]}, {'provenance': [{'wikipedia_id': '711881', 'title': 'Independent Local Radio', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 585, 'bleu_score': 0.979054689945215, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18184004511923867663}, 'section': 'Section::::History.:Development of ILR.\n'}]}]