Question: what are the 5 most populated cities in the uk
[{'answer': 'City of London', 'provenance': [{'wikipedia_id': '779970', 'title': 'List of cities in the United Kingdom', 'start_paragraph_id': 1, 'start_character': 593, 'end_paragraph_id': 1, 'end_character': 607, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Glasgow', 'provenance': [{'wikipedia_id': '779970', 'title': 'List of cities in the United Kingdom', 'start_paragraph_id': 6, 'start_character': 327, 'end_paragraph_id': 6, 'end_character': 334, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'answer': 'Birmingham'}, {'answer': 'Liverpool'}, {'answer': 'Bristol'}]