2755
Located west of Seoul the capital and largest city of  South Korea  Incheon International Airport is the main hub for Korean Air Asiana Airlines Jeju Air and  Polar Air Cargo  .
 country of headquarters: South Korea, Polar Air Cargo
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: South Korea, Polar Air Cargo