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Divided into eastern , western , and northern sections , it includes an 18-hole disc golf course and pens that are home to a herd of American bison kept at the park since 1953 .
 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:
 American bison