11391
United bank  Ltd. one of the largest banks in Pakistan is developing its Head Office at Ibrahim Ismail Chundrigar Road  Karachi  and hired Shankland Cox of England and ESS-I-AAR for Engineering Design of the tower .
 city of headquarters: United bank, Karachi
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: United bank, Karachi