Question: when did they start 3 pointers in basketball
[{'answer': '1961', 'provenance': [{'wikipedia_id': '2214267', 'title': 'Three-point field goal', 'start_paragraph_id': 5, 'start_character': 292, 'end_paragraph_id': 5, 'end_character': 296, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'answer': '1945', 'provenance': [{'wikipedia_id': '2214267', 'title': 'Three-point field goal', 'start_paragraph_id': 5, 'start_character': 65, 'end_paragraph_id': 5, 'end_character': 69, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '2214267', 'title': 'Three-point field goal', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 285, 'bleu_score': 0.5179074676021781, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15869819915197376772}, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '2214267', 'title': 'Three-point field goal', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15869819915197376772}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2214267', 'title': 'Three-point field goal', 'section': 'Section::::Abstract.', 'start_paragraph_id': 2, 'end_paragraph_id': 2, 'meta': {'evidence_span': ['The three-point line was first tested at the collegiate level in 1945', 'The three-point line was first tested at the collegiate level in 1945']}}]}, {'provenance': [{'wikipedia_id': '2214267', 'title': 'Three-point field goal', 'section': 'Section::::History.\n', 'start_paragraph_id': 5, 'end_paragraph_id': 5, 'meta': {'evidence_span': ['In 1961, Boston University and Dartmouth played one game with an experimental rule that counted all field goals as three points.', 'The three-point line was first tested at the collegiate level in 1945']}}]}]