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The Bright Side , 1865 , is an oil painting by Winslow Homer of three African American Union Army teamsters sitting on the sunny side of a Sibley tent .
 Winslow Homer, Union Army
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Winslow Homer, Union Army