Question: when did the oregon trail game come out
[{'answer': 'December 3 , 1971', 'provenance': [{'wikipedia_id': '54246165', 'title': 'The Oregon Trail (series)', 'start_paragraph_id': 4, 'start_character': 50, 'end_paragraph_id': 4, 'end_character': 67, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}]