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Giovanni Battista Franzoni ( born 8 November 1928 , Varna ) is a Christian communist and dissident Catholic theologian .
 Giovanni, Franzoni, Varna
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Giovanni, Franzoni, Varna