Question: when was the first personal computer sold to the public
[{'answer': '1981', 'provenance': [{'wikipedia_id': '16142167', 'title': 'History of personal computers', 'start_paragraph_id': 43, 'start_character': 3, 'end_paragraph_id': 43, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::The beginnings of the personal computer industry.:Xerox Alto and Star.\n'}]}, {'provenance': [{'wikipedia_id': '16142167', 'title': 'History of personal computers', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 725, 'bleu_score': 0.8377908978390041, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4674702817389932798}, 'section': 'Section::::Abstract.'}]}]