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After his return to  Germany  began work in the department of economics for the workers union  IG Metall  followed by 4 years at the Organization for European Economic Cooperation in Washington D.C. and Paris .
 country of headquarters: Germany, IG Metall
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: Germany, IG Metall