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In 2008 his opera " King Roger " , which is regarded as his masterpiece , was performed at Edinburgh International Festival under the baton of Valery Gergiev and his renowned Mariinsky opera company .
 person: Valery Gergiev; location: Mariinsky
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Valery Gergiev; location: Mariinsky