Question: when was television made available to the public
[{'answer': '1928', 'provenance': [{'wikipedia_id': '3636075', 'title': 'History of television', 'start_paragraph_id': 9, 'start_character': 90, 'end_paragraph_id': 9, 'end_character': 94, 'bleu_score': 1.0, 'section': 'Section::::Mechanical television.\n'}]}, {'provenance': [{'wikipedia_id': '3636075', 'title': 'History of television', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 188, 'bleu_score': 0.9364250605898111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17839790541179601853}, 'section': 'Section::::Mechanical television.\n'}]}]