337090
Paul 's reign On December 3 , 1796 Pahlen was appointed to run a cuirassier regiment of Riga , but soon the new Emperor made him regret his former contacts with the disgraced prince Platon Zubov .
 person: Pahlen; location: Riga; person: Emperor; person: Platon Zubov
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: Pahlen, Riga, Emperor, Platon Zubov 
Answer:
 person: Pahlen; location: Riga; person: Emperor; person: Platon Zubov