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By July 31 2007  Vietnam  had 197 companies having their shares either listed or registered for transactions at the  Ho Chi Minh  City Stock Exchange and the Hanoi Securities Trading Center with total value of 276.80 trillion VND ( 17.30 billion dollars ) or 28.4 percent of the country's GDP in 2006 according to the country's State Securities Commission .
 country of headquarters: Vietnam, Ho Chi Minh
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:  Vietnam, Ho Chi Minh 
Answer:
 country of headquarters: Vietnam, Ho Chi Minh