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The short story De Doop deals with the conversion of emperor Constantine the Great to Christianity , while De Gladiator takes place in the gladiator school in Ravenna .
 person: Constantine the Great; location: Ravenna
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Constantine the Great, Ravenna 
Answer:
 person: Constantine the Great; location: Ravenna