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Jan Stankievič graduated from the Vilnia Belarusian Gymnasium in 1921 , the Charles University in Prague in 1926 , became Doctor of Slavonic philology and history .
 Jan Stankievič, Belarusian, Charles University in Prague
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Jan Stankievič, Belarusian, Charles University in Prague