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According to romantic legend , the Zierotins were the offspring of prince Oleg of Drelinia , brother of Vladimir I of Kiev , and thereupon the family uses in its coat of arms a royal crown ( or more properly the crown of Grand Prince ) and princely mantling .
 person: Oleg of Drelinia; person: Vladimir I of Kiev
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Oleg of Drelinia, Vladimir I of Kiev 
Answer:
 person: Oleg of Drelinia; person: Vladimir I of Kiev