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As a young man Zubov had flattering prospects of a brilliant military career due to his brother Platon 's ascendancy at Catherine II 's court .
 Zubov, Platon, Catherine II
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Zubov, Platon, Catherine II