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He also was the garrison commander of Chengdu from 1916 to 1918 .
 location: Chengdu
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: Chengdu 
Answer:
 location: Chengdu