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Among the attendees were Prime Minister Tony Blair of Britain ; Bill Gates , the Microsoft chairman ; Viktor A. Yushchenko , the new president of Ukraine ; Sergey Brin and Larry Page , the Google co-founders ; former President Bill Clinton ; Senator Bill Frist of Tennessee , the majority leader ; and the South African novelist Nadine Gordimer .
 Microsoft, Bill Gates; Bill Gates, Microsoft
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
Answer:
 Microsoft, Bill Gates; Bill Gates, Microsoft