Question: when was the last team added to the nba
[{'answer': '2002', 'provenance': [{'wikipedia_id': '22093', 'title': 'National Basketball Association', 'start_paragraph_id': 41, 'start_character': 558, 'end_paragraph_id': 41, 'end_character': 562, 'bleu_score': 1.0, 'section': 'Section::::History.:Other developments.\n'}]}]