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Later after his patrons death he moved to St. Petersburg in the service of Russian emperor Paul I. He was his chamberlain and also served as ambassador in Washington .
 location: St. Petersburg; location: Washington
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:
 location: St. Petersburg; location: Washington