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Shares of  AGL Energy  Ltd.  Australia  's biggest power retailer tumbled Monday after the company lowered its earnings outlook as margins have come under pressure from soaring wholesale electricity prices .
 country of headquarters: AGL Energy, 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: AGL Energy, Australia