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The Imperial crown once held by the Carolingian emperors was disputed between their fractured heirs and local overlords ; none emerged victorious until Otto I , Holy Roman Emperor invaded Italy .
 person: Otto I , Holy Roman Emperor
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: Otto I , Holy Roman Emperor 
Answer:
 person: Otto I , Holy Roman Emperor