Question: who had the most triple doubles in the nba
[{'answer': 'Oscar Robertson', 'provenance': [{'wikipedia_id': '23178183', 'title': 'Double-double (basketball)', 'start_paragraph_id': 15, 'start_character': 11, 'end_paragraph_id': 15, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Triple-double.:NBA.\n'}]}]