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Later he studied at the Russicum and the Gregorian University in Rome , but because of health problems was transferred to the Theological Seminary in Presov , after which he was ordained a priest of the Byzantine rite .
 Gregorian University, Rome
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Gregorian University, Rome