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Sunil Gulati , the Columbia University economics professor who was elected in March as the president of the United States Soccer Federation , said during a telephone conference call yesterday that a worldwide search will soon begin for Arena 's replacement .
 Sunil Gulati, Columbia University
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:
 Sunil Gulati, Columbia University