Question: what is the most popular newspaper in the uk
[{'answer': 'The Sun', 'provenance': [{'wikipedia_id': '21734083', 'title': 'List of newspapers in the United Kingdom by circulation', 'start_paragraph_id': 4, 'start_character': 18, 'end_paragraph_id': 4, 'end_character': 25, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]