4655
There are a number of skyscrapers in  Vietnam  which are under construction which are : Lotte Center Hanoi 267 meters tall twin towers of The One  HCMC  with the tallest one is 240 meters .
 country of headquarters: Vietnam, HCMC
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:
 country of headquarters: Vietnam, HCMC