Question: how many triple doubles did kobe bryant have in his career
[{'answer': '21', 'provenance': [{'wikipedia_id': '23178183', 'title': 'Double-double (basketball)', 'start_paragraph_id': 32, 'start_character': 299, 'end_paragraph_id': 32, 'end_character': 301, 'bleu_score': 1.0, 'section': 'Section::::Triple-double.:NBA.:Facts.\n'}]}]