Question: when was the television introduced to the public
[{'answer': 'July 2 , 1928', 'provenance': [{'wikipedia_id': '3636075', 'title': 'History of television', 'start_paragraph_id': 113, 'start_character': 79, 'end_paragraph_id': 113, 'end_character': 92, 'bleu_score': 1.0, 'section': 'Section::::Terrestrial television.:United States.\n'}]}, {'provenance': [{'wikipedia_id': '3636075', 'title': 'History of television', 'start_paragraph_id': 113, 'start_character': 0, 'end_paragraph_id': 113, 'end_character': 470, 'bleu_score': 0.8869794465538711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6803775199874999055}, 'section': 'Section::::Terrestrial television.:United States.\n'}]}]