Question: who is the oldest player currently playing in the nba
[{'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.'}]}, {'provenance': [{'wikipedia_id': '27196905', 'title': 'List of oldest and youngest National Basketball Association players', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 584, 'bleu_score': 0.6261293183315101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1590528977094808661}, 'section': 'Section::::Abstract.'}]}]