Question: when did the commodore vic 20 come out
[{'answer': 'in 1980', 'provenance': [{'wikipedia_id': '72155', 'title': 'Commodore VIC-20', 'start_paragraph_id': 1, 'start_character': 148, 'end_paragraph_id': 1, 'end_character': 155, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '72155', 'title': 'Commodore VIC-20', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 307, 'bleu_score': 0.6173767918944051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2528771435349574905}, 'section': 'Section::::Abstract.'}]}]