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This is the first study to measure the changing number of patients in a North American population during a period of major progress in the management of CHD said Ariane J. Marelli M.D. lead author of the study and director of the McGill Adult Unit for Congenital Heart Disease Excellence at  McGill University  in Montreal Quebec  Canada  .
 country of headquarters: McGill University, Canada
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: McGill University, Canada