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Gertrude Abercrombie ( February 17 , 1909 – July 3 , 1977 ) was an American painter based in Chicago .
 Gertrude Abercrombie, Chicago
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Gertrude Abercrombie, Chicago