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Bakker wrote a book called De CPN in de oorlog ( The CPN during the war , 1958 ) , in which he accused prominent party members such as Gerben Wagenaar , Henk Gortzak , Frits Reuter and Bertus Brandsen of being spies .
 person: Bakker; person: Gerben Wagenaar
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Bakker, Gerben Wagenaar 
Answer:
 person: Bakker; person: Gerben Wagenaar