Question: who has been in the nba the longest currently
[{'answer': 'Vince Carter', 'provenance': [{'wikipedia_id': '27196905', 'title': 'List of oldest and youngest National Basketball Association players', 'start_paragraph_id': 2, 'start_character': 329, 'end_paragraph_id': 2, 'end_character': 341, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]