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Palladius ( c. 420 – June 455 ) was Caesar of the Western Roman Empire for two months in 455 , together with his father Petronius Maximus .
 person: Palladius; location: Western Roman Empire; person: Petronius Maximus
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: Palladius, Western Roman Empire, Petronius Maximus 
Answer:
 person: Palladius; location: Western Roman Empire; person: Petronius Maximus