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He worked in Prague for a magazine called " Problems of Peace and Socialism " , later at the Moscow Institute of the Economy of the World Social System .
 location: Prague; location: Moscow
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: Prague, Moscow 
Answer:
 location: Prague; location: Moscow