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Jerzy Łoś ( born March 22 , 1920 in Lwów ( now Lviv , Ukraine ) - June 1 , 1998 in Warsaw ) ( ) was a Polish mathematician , logician , economist , and philosopher .
 Jerzy Łoś, Lviv, Warsaw, Polish
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
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Answer:
 Jerzy Łoś, Lviv, Warsaw, Polish