Question: who has the most knockouts in boxing history
[{'answer': 'Billy Bird', 'provenance': [{'wikipedia_id': '17163', 'title': 'Knockout', 'start_paragraph_id': 24, 'start_character': 13, 'end_paragraph_id': 24, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Knockout records.:Top 10 boxers by most KOs.\n'}]}]