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The Chairman 's Stakes is a South Australian Jockey Club Group 3 Thoroughbred horse race for horses aged three years old , at set weights , over a distance of 2,000 metres at the Morphettville Racecourse in the Autumn Carnival .
 South Australian Jockey Club
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 South Australian Jockey Club