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Natalia Melnikova ( Russian : Наталья Мельникова ) is a Russian head coach in acrobatic gymnastics working in Moscow .
 Natalia Melnikova, Moscow
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Natalia Melnikova, Moscow