Question: where did the term barbershop quartet come from
[{'answer': '1882', 'provenance': [{'wikipedia_id': '386123', 'title': 'Barbershop music', 'start_paragraph_id': 18, 'start_character': 193, 'end_paragraph_id': 18, 'end_character': 197, 'bleu_score': 1.0, 'section': 'Section::::Historical origins.\n'}]}, {'provenance': [{'wikipedia_id': '386123', 'title': 'Barbershop music', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 362, 'bleu_score': 0.938501942261528, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 818434395079101887}, 'section': 'Section::::Historical origins.\n'}]}]