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Agrippina only survives due to the protection of Livia , who holds vital information regarding Augustus ' true opinion of Tiberius .
 person: Agrippina; person: Livia; person: Augustus; person: Tiberius
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: Agrippina; person: Livia; person: Augustus; person: Tiberius