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The same year , CŻKH published his Walka i zagłada Białostockiego Ghetta ( The fight and annihilation of the Białystok ghetto ) in Łódź .
 Białystok, Łódź
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Białystok, Łódź