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Two hours into a flight from  Ho Chi Minh  City to Sydney on Saturday the pilot was forced to return to  Vietnam  so the passenger could receive emergency medical treatment said Nguyen Van Quat the administrative head of the Southern Airport Authorities .
 countries of residence: Ho Chi Minh, Vietnam
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
 Entity Pairs:  Ho Chi Minh, Vietnam 
Answer:
 countries of residence: Ho Chi Minh, Vietnam