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Education and early career Piotroski received a B.S. in accounting from the University of Illinois in 1989 , the same year in which he became a certified public accountant in the state of Illinois .
 Piotroski, University of Illinois, Illinois
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Piotroski, University of Illinois, Illinois