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Federico Varese , a Professor in Criminology at the University of Oxford , offers yet another view of organized crime , particularly pertaining to mafia groups , " a mafia group is a particular type of organized crime that specializes in one particular commodity [ ... ] protection " .
 University of Oxford
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 Oxford