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During its first two centuries , the empire was ruled by emperors of the Julio-Claudian , Flavian ( who also built an eponymous amphitheatre , known as the Colosseum ) , and Antonine dynasties .
 Julio-Claudian, Flavian, Colosseum, Antonine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Julio-Claudian, Flavian, Colosseum, Antonine