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Alexandra " Sasha " Sergeevna Obolentseva ( ; born June 21 , 2001 in Tula , Russia ) is a Russian chess player .
 Alexandra, Obolentseva, Tula , Russia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Alexandra, Obolentseva, Tula , Russia