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Kopinič set up a radio-transmitter in Zagreb in 1940 which become the major information point between the Italian and Greek communist parties and the Comintern in Moscow .
 Kopinič, Zagreb, Comintern
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kopinič, Zagreb, Comintern