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They had two sons , whom Domitian intended to succeed him in the empire , renaming one of them Vespasian and the other Domitian .
 person: Domitian; person: Vespasian; person: Domitian
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: Domitian, Vespasian, Domitian 
Answer:
 person: Domitian; person: Vespasian; person: Domitian