7709
Later APAC expanded to include other international schools in  China  (  American International School of Guangzhou  Western Academy of Beijing Shanghai American School Pudong Concordia International School Shanghai ) Hong Kong ( Hong Kong International School ) South Korea ( Taejon Christian School ) and Vietnam ( United Nations International School of Hanoi ) .
 country of headquarters: China, American International School of Guangzhou
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: China, American International School of Guangzhou