8525
Upon Augustus ' death , Tiberius is declared emperor , though his mother Livia retains her power and influence as empress .
 person: Augustus; person: Tiberius; person: Livia
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: Augustus; person: Tiberius; person: Livia