Question: who has the most slam dunk contest wins
[{'answer': 'Nate Robinson', 'provenance': [{'wikipedia_id': '1826771', 'title': 'Slam Dunk Contest', 'start_paragraph_id': 16, 'start_character': 90, 'end_paragraph_id': 16, 'end_character': 103, 'bleu_score': 1.0, 'section': 'Section::::History.:2000s.\n'}]}]