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A cowboy , George McJunkin , found an ancient bison ( " Bison antiquus " , an extinct relative of the American bison ) skeleton in 1908 after a flash flood .
 George McJunkin, American bison
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 George McJunkin, American bison