Question: when did the nba ban high school players
[{'answer': '2006', 'provenance': [{'wikipedia_id': '2533547', 'title': 'NBA high school draftees', 'start_paragraph_id': 1, 'start_character': 305, 'end_paragraph_id': 1, 'end_character': 309, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2533547', 'title': 'NBA high school draftees', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 1020, 'bleu_score': 0.8737282166462351, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12438025894251925233}, 'section': 'Section::::Abstract.'}]}]