Question: who sang lead vocals on blue collar man
[{'answer': 'Tommy Shaw', 'provenance': [{'wikipedia_id': '12211255', 'title': 'Blue Collar Man (Long Nights)', 'start_paragraph_id': 1, 'start_character': 529, 'end_paragraph_id': 1, 'end_character': 539, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '12211255', 'title': 'Blue Collar Man (Long Nights)', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 49, 'bleu_score': 0.6803749333171201, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9329186295858524393}, 'section': 'Section::::Personnel.\n'}]}]