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On return from UK Joint service training in 1971 he became Colonel Coordination in the office of Chief of the General Staff and in April 1974 was promoted to Brigadier , Chief of Staff at HQ Field Force Command in Sydney until December 1975 .
 location: Sydney
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: Sydney 
Answer:
 location: Sydney