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After graduating from his four-year collegiate career with the University of Wisconsin , Klubertanz made his professional debut on a try-out contract with the Ducks AHL affiliate , the Portland Pirates at the end of the 2007 – 08 season .
 University of Wisconsin, Klubertanz, Ducks, Portland Pirates
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 University of Wisconsin, Klubertanz, Ducks, Portland Pirates