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The woman character is believed to have been based on Mickiewicz 's own sweetheart from Kowno , Karolina Kowalska .
 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:
 Mickiewicz, Kowno