7506
Philippine Airlines  is the first carrier in the  Philippines  to offer Wi-Fi on board which began on April 1 2013 .
 country of headquarters: Philippine Airlines, Philippines
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:  Philippine Airlines, Philippines 
Answer:
 country of headquarters: Philippine Airlines, Philippines