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In 1954 , Kortokraks joined the School of Vision , part of the international Summer Academy in Salzburg , as a teaching assistant to Oskar Kokoschka .
 person: Kortokraks; location: Salzburg; person: Oskar Kokoschka
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: Kortokraks, Salzburg, Oskar Kokoschka 
Answer:
 person: Kortokraks; location: Salzburg; person: Oskar Kokoschka