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Grażyna is a 1823 narrative poem by Adam Mickiewicz , written in the summer of 1822 during a year-long sabbatical in Vilnius , while away from his teaching duties in Kowno .
 Adam Mickiewicz, Kowno
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Adam Mickiewicz, Kowno