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Stratton 's mother , the daughter of Colonel LeGrand W. Perce , a lawyer practising at the Chicago Bar , was one of six children and was described as " One of the most promising young singers of Chicago ... Miss Perce has a pure , even soprano voice , of great range , clear , sweet quality and of more than usual power . "
 Stratton, Chicago Bar
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Stratton, Chicago Bar