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He had three daughters and four sons , of whom three — Nicholas , Platon , and Valerian — were made count s by Emperor Francis II : The lines of Count Nicholas and his brother Dmitry continue up to the present .
 person: Platon; person: Emperor Francis II
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: Platon; person: Emperor Francis II