7355
HNA Group a Chinese airlines based in  Haikou  capital of Hainan Province said two of its subsidiaries Grand China Air ( CN ) and  Hainan Airlines  Company Limited ( HU ) would also recruit 100 in - flight stewards and stewardesses from the Game's volunteers .
 city of headquarters: Haikou, Hainan Airlines
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:
 city of headquarters: Haikou, Hainan Airlines