18166
Most of Changde 's civilian population have evacuated , leaving behind Yu and his troops to defend the isolated city .
 location: Changde
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: Changde 
Answer:
 location: Changde