Question: when does the us open air on tv
[{'answer': '1954', 'provenance': [{'wikipedia_id': '82454', 'title': 'List of United States over-the-air television networks', 'start_paragraph_id': 1, 'start_character': 514, 'end_paragraph_id': 1, 'end_character': 518, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '82454', 'title': 'List of United States over-the-air television networks', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 676, 'bleu_score': 0.9575690457118191, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3887240449090104039}, 'section': 'Section::::Abstract.'}]}]