2876
All of  Pakistan  's airlines use Karachi as their primary transport hub including PIA Pakistan International Airlineshttp : / / www.piac.aero Airblue and  Shaheen Air International  .
 country of headquarters: Pakistan, Shaheen Air International
Given options, please tell me the relationships of all the listed entity pairs.Output format is "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} 
 Entity Pairs:  Pakistan, Shaheen Air International 
Answer:
 country of headquarters: Pakistan, Shaheen Air International