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Growing to fear Germanicus ' popularity more and more , Tiberius sends a hostile governor , Gnaeus Calpurnius Piso , to spy on Germanicus .
 person: Germanicus; person: Tiberius; person: Gnaeus Calpurnius Piso; person: Germanicus
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: Germanicus; person: Tiberius; person: Gnaeus Calpurnius Piso; person: Germanicus