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He was based in Saint Petersburg until 2014 , when he moved to Sochi , to coach at the Iceberg Skating Palace .
 Saint Petersburg, Sochi, Iceberg Skating Palace
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Saint Petersburg, Sochi, Iceberg Skating Palace