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The term was not commonly used in geographical literature until the mid-19 th century because already then scientists like Carl Ritter warned that only the part South of the Balkan Mountains can be considered as a peninsula and considered it to be renamed as " Greek peninsula " .
 person: Carl Ritter; location: Balkan Mountains
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: Carl Ritter, Balkan Mountains 
Answer:
 person: Carl Ritter; location: Balkan Mountains