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Believing as Radić did that the Croats needed to embrace Pan-Slavism , Basariček learned Czech and Russian .
 Radić, Croats, Basariček
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Radić, Croats, Basariček