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Piotroski is known in the investing world for an influential 2000 paper he wrote while at the University of Chicago , entitled Value Investing : The Use of Historical Financial Statement Information to Separate Winners from Losers .
 Piotroski, University of Chicago
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 Chicago