Question: who has had most uk number 1's
[{'answer': 'Paul McCartney', 'provenance': [{'wikipedia_id': '2511761', 'title': 'List of artists by number of UK Singles Chart number ones', 'start_paragraph_id': 2, 'start_character': 59, 'end_paragraph_id': 2, 'end_character': 73, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2511761', 'title': 'List of artists by number of UK Singles Chart number ones', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 633, 'bleu_score': 0.9832621206481431, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9984585162923967253}, 'section': 'Section::::Abstract.'}]}]