Question: when was the first laptop introduced to the public
[{'answer': '1981', 'provenance': [{'wikipedia_id': '16785037', 'title': 'History of laptops', 'start_paragraph_id': 6, 'start_character': 145, 'end_paragraph_id': 6, 'end_character': 149, 'bleu_score': 1.0, 'section': 'Section::::Portable precursors.:Osborne 1.\n'}]}, {'provenance': [{'wikipedia_id': '16785037', 'title': 'History of laptops', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 884, 'bleu_score': 0.9647750459185931, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2388116499195886428}, 'section': 'Section::::Portable precursors.:Osborne 1.\n'}]}]