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The Čierny Hron Railway ( in Slovak : Čiernohronská železnica or ČHŽ ) is a narrow gauge railway in the Slovak Ore Mountains , built as an industrial railway for logging operations .
 location: Čierny
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: Čierny 
Answer:
 location: Čierny