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As reported in this column , James M. Poterba , an economics professor at the Massachusetts Institute of Technology , recently found only modest statistical support at best for the notion that the aging of baby boomers would cause overall equity returns to be lower over the next several decades .
 person of company: James M. Poterba, Massachusetts Institute of Technology
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:  James M. Poterba, Massachusetts Institute of Technology 
Answer:
 person of company: James M. Poterba, Massachusetts Institute of Technology