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He was seen on stage in such roles as Esko in an Aleksis Kivi play Nummisuutarit and Jago in William Shakespeare 's Othello .
 Aleksis Kivi, William Shakespeare
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Aleksis Kivi, William Shakespeare