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Yuan represented China at the 2012 Summer Olympics in London , where she competed in the women 's 25 m pistol , along with her teammate and defending Olympic champion Chen Ying .
 Yuan, China, London, Chen Ying
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Yuan, China, London, Chen Ying