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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 .
 employee of: Treasury, Paul O'Neill
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:
 employee of: Treasury, Paul O'Neill