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Some of the most respected names in the business world were pitching in Friday including billionaire investor Warren Buffett former Federal Reserve Chairman Paul Volcker former  Treasury  secretaries Robert Rubin Lawrence Summers and  Paul O'Neill  and Laura Tyson former head of the Council of Economic Advisers under President Clinton .
 Treasury, Paul O'Neill
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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:
 Treasury, Paul O'Neill