Question: when was the first flat screen tv sold
[{'answer': '1958', 'provenance': [{'wikipedia_id': '293396', 'title': 'Flat-panel display', 'start_paragraph_id': 5, 'start_character': 434, 'end_paragraph_id': 5, 'end_character': 438, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '293396', 'title': 'Flat-panel display', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 1473, 'bleu_score': 0.9732728916026231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5289546599800306445}, 'section': 'Section::::History.\n'}]}]