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Its endorsement by Emperor Charlemagne and his successors popularizing the use of the epoch and spreading it throughout the Carolingian Empire ultimately lies at the core of the system 's prevalence .
 person: Charlemagne; location: Carolingian Empire
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: Charlemagne, Carolingian Empire 
Answer:
 person: Charlemagne; location: Carolingian Empire