Question: when did the radio became a household item
[{'answer': 'mid-1922', 'provenance': [{'wikipedia_id': '1598357', 'title': 'Radio in the United States', 'start_paragraph_id': 50, 'start_character': 376, 'end_paragraph_id': 50, 'end_character': 384, 'bleu_score': 1.0, 'section': 'Section::::History.:Post–World War I.\n'}]}]