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This study contributes to accumulating evidence that caloric restriction acts by altering hormone levels rather than by directly starving cancers of energy Dr. Michael Pollak a professor of oncology at  McGill University  in  Montreal  wrote in an accompanying editorial .
 city of headquarters: McGill University, Montreal
Given options, please tell me the relationships of all the listed entity pairs.Output format is "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} 
 Entity Pairs:  McGill University, Montreal 
Answer:
 city of headquarters: McGill University, Montreal