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Wilhelm Heinrich Detlev " Big Bill " Körner ( November 1878 – August 11 , 1938 ) , also known as Wilhelm Heinrich Dethlef Koerner , William HD Koerner , WHDK , or W.H.D. Koerner , was a noted illustrator of the American West whose works became known to new audiences when his painting , nicknamed A Charge to Keep , was used as the cover image for the ghostwritten biography by the same name by George W. Bush .
 Wilhelm Heinrich Detlev, Körner, Wilhelm Heinrich, George W. Bush
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Wilhelm Heinrich Detlev, Körner, Wilhelm Heinrich, George W. Bush