Question: who is the oldest player to ever play in the nba
[{'answer': 'Nat Hickey', 'provenance': [{'wikipedia_id': '27196905', 'title': 'List of oldest and youngest National Basketball Association players', 'start_paragraph_id': 2, 'start_character': 46, 'end_paragraph_id': 2, 'end_character': 56, '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': 0.7193056637674741, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5704920136967389526}, 'section': 'Section::::Abstract.'}]}]