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Following Julius Caesar 's death , Cicero became an enemy of Mark Antony in the ensuing power struggle , attacking him in a series of speeches .
 Julius Caesar, Cicero, Mark Antony
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Julius Caesar, Cicero, Mark Antony