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Both the men 's and the women 's events were held at the Olympic Green Tennis Center in Beijing , People 's Republic of China , from October 2 through October 11 , 2009 .
 Beijing, People 's Republic of China
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Beijing, People 's Republic of China