Question: who has the most double doubles in nba playoff history
[{'answer': 'Tim Duncan', 'provenance': [{'wikipedia_id': '23178183', 'title': 'Double-double (basketball)', 'start_paragraph_id': 4, 'start_character': 18, 'end_paragraph_id': 4, 'end_character': 28, 'bleu_score': 1.0, 'section': 'Section::::Double-double.\n'}]}]