Question: when was the first 3d printer released to the public
[{'answer': '1992', 'provenance': [{'wikipedia_id': '1305947', 'title': '3D printing', 'start_paragraph_id': 13, 'start_character': 298, 'end_paragraph_id': 13, 'end_character': 302, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '1305947', 'title': '3D printing', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 302, 'bleu_score': 0.957870874785216, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2450747852855931168}, 'section': 'Section::::History.\n'}]}]