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In a video released on Jan. 9 by the Pakistan Taliban Hammam Khalil al-Balawi the alleged Jordanian bomber is seen sitting next to Mehsud  IntelCenter  an  Alexandria  Va. - based organization that tracks terrorist videos said in a statement .
 city of headquarters: IntelCenter, Alexandria
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: IntelCenter, Alexandria