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I think the biggest single way it 's affected the U.S. economy is that investment levels in Japan and Europe are very low -- and that 's keeping global interest rates low , '' said Kenneth Rogoff , a professor of economics at Harvard University .
 person of company: Kenneth Rogoff, Harvard University
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: 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} 
 Entity Pairs:  Kenneth Rogoff, Harvard University 
Answer:
 person of company: Kenneth Rogoff, Harvard University