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Germany  's biggest energy company EON said on Thursday it was buying the US wind energy activities of Ireland's  Airtricity  for 1.4 billion dollars ( 1.0 billion euros ) strengthening its position in the sector outside Europe .
 country of headquarters: Germany, Airtricity
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, Airtricity