1491
In  Islamabad   PIA  spokesman Nasir Jamal said the restrictions on the Boeing 747 and Airbus 310s were only being temporarily applied and they would be able to fly again once they have been upgraded .
 city of headquarters: Islamabad, PIA
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: Islamabad, PIA