Question: when did the nba extend the 3 point line
[{'answer': '1997 -- 98'}, {'provenance': [{'wikipedia_id': '2214267', 'title': 'Three-point field goal', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 396, 'bleu_score': 0.589457341794489, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3812513068868136115}, 'section': 'Section::::History.\n'}]}]