4140
On 18 August 1971 Prime Minister William McMahon announced that 1 ATF would cease operations in October with the last combat elements of the regiment ( D Company 4  RAR  ) returning to  Australia  in February 1972 .
 country of headquarters: RAR, Australia
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: RAR, Australia