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Vespasia Polla ( also known as Vespasia Pollia , born c. 15 BC , fl 1st century AD ) was the mother of the Roman Emperor Vespasian , grandmother to Emperors to Titus and Domitian .
 Vespasia Polla, Vespasia, Vespasian, Titus, Domitian
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Vespasia Polla, Vespasia, Vespasian, Titus, Domitian