Question: who has had the most top ten hits
[{'answer': 'Madonna', 'provenance': [{'wikipedia_id': '2654171', 'title': 'List of Billboard Hot 100 chart achievements and milestones', 'start_paragraph_id': 186, 'start_character': 221, 'end_paragraph_id': 186, 'end_character': 228, 'bleu_score': 1.0, 'section': 'Section::::Artist achievements.:Most number-one singles.\n'}]}]