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The purpose of the operation was to interdict the flow of People's Army of Vietnam ( PAVN ) supplies on the  Ho Chi Minh  Trail ( the Truong Son Strategic Supply Route to the North Vietnamese ) from the Democratic Republic of  Vietnam  ( North Vietnam ) through southeastern Laos and into the northern provinces of the Republic of Vietnam ( South Vietnam ) .
 countries of residence: Ho Chi Minh, Vietnam
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "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} 
Answer:
 countries of residence: Ho Chi Minh, Vietnam