Question: when did the first hd tv come out
[{'answer': '1998', 'provenance': [{'wikipedia_id': '2477349', 'title': 'High-definition television in the United States', 'start_paragraph_id': 1, 'start_character': 73, 'end_paragraph_id': 1, 'end_character': 77, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2477349', 'title': 'High-definition television in the United States', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 571, 'bleu_score': 0.9536330554540541, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16632011062884012611}, 'section': 'Section::::Abstract.'}]}]