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The history of Bavaria includes its earliest settlement by Iron Age Celtic tribes , followed by the conquests of the Roman Empire in the 1st century BC , when the territory was incorporated into the provinces of Raetia and Noricum .
 location: Bavaria; location: Roman Empire; location: Raetia; location: Noricum
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: Bavaria, Roman Empire, Raetia, Noricum 
Answer:
 location: Bavaria; location: Roman Empire; location: Raetia; location: Noricum