Question: who sings shuffle off to buffalo in 42nd street
[{'answer': 'Ruby Keeler', 'provenance': [{'wikipedia_id': '840058', 'title': '42nd Street (film)', 'start_paragraph_id': 1, 'start_character': 126, 'end_paragraph_id': 1, 'end_character': 137, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Clarence Nordstrom', 'provenance': [{'wikipedia_id': '840058', 'title': '42nd Street (film)', 'start_paragraph_id': 40, 'start_character': 84, 'end_paragraph_id': 40, 'end_character': 102, 'bleu_score': 1.0, 'section': 'Section::::Musical numbers.\n'}]}, {'provenance': [{'wikipedia_id': '840058', 'title': '42nd Street (film)', 'start_paragraph_id': 40, 'start_character': 0, 'end_paragraph_id': 40, 'end_character': 149, 'bleu_score': 0.9146912192286941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11872021157755944581}, 'section': 'Section::::Musical numbers.\n'}]}]