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led by Canadian  Prime Minister   Brian Mulroney  U.S. President George H. W. Bush and the Mexican President Carlos Salinas de Gortari .
 title of person: Prime Minister, Brian Mulroney
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:  Prime Minister, Brian Mulroney 
Answer:
 title of person: Prime Minister, Brian Mulroney