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In a sign that McCain was now willing to battle Giuliani the former mayor of New York in the city and state that gave rise to Giuliani's political fortunes McCain released a list of his New York supporters among them Henry A. Kissinger the former secretary of state and  Peter G. Peterson  a co-founder of the  Blackstone Group  and a former secretary of commerce .
 Peter G. Peterson, Blackstone Group
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:
 Peter G. Peterson, Blackstone Group