Question: when was music first played on the radio
[{'answer': '1917', 'provenance': [{'wikipedia_id': '25522', 'title': 'History of radio', 'start_paragraph_id': 74, 'start_character': 263, 'end_paragraph_id': 74, 'end_character': 267, 'bleu_score': 1.0, 'section': 'Section::::Audio broadcasting (1919 to 1950s).:Licensed commercial public radio stations.\n'}]}, {'provenance': [{'wikipedia_id': '25522', 'title': 'History of radio', 'start_paragraph_id': 74, 'start_character': 0, 'end_paragraph_id': 74, 'end_character': 387, 'bleu_score': 0.9684940092844061, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5519349124824268196}, 'section': 'Section::::Audio broadcasting (1919 to 1950s).:Licensed commercial public radio stations.\n'}]}]