2501
Headquartered in Haikou of southern  Hainan  Province the new carrier is to inherit the business from  Hainan Airlines  the first sino-foreign invested airline which has evolved into the country's fourth largest after consolidating the operation of three other small airlines namely Xinhua Chang ' an and Shanxi in 2002 .
 city of headquarters: Hainan, 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: Hainan, Hainan Airlines