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The historiography of Attila is faced with a major challenge , in that the only complete sources are written in Greek and Latin by the enemies of the Huns .
 person: Attila
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: Attila 
Answer:
 person: Attila