1705
The Director General of the Security Service is the head of the Security Service ( commonly known as  MI5  ) the  United Kingdom  's internal counter-intelligence and security agency .
 country of headquarters: MI5, United Kingdom
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:
 country of headquarters: MI5, United Kingdom