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At the age of fifteen , Qian performed Mozart ’s Piano Concerto in the Queen Elizabeth Hall , London and later at the Menuhin Festival in Gstaad , Switzerland .
 Qian, Menuhin, Switzerland
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Qian, Menuhin, Switzerland