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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 .
 top members employees: professor, McGill University
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:
 top members employees: professor, McGill University