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BIOGRAPHY Kai Bird and Martin J. Sherwin '' American Prometheus : The Triumph and Tragedy of J. Robert Oppenheimer '' Mr. Sherwin , 68 , a professor of history at Tufts University , had been working on this book on and off for over 20 years when he approached Mr. Bird , 54 , with the idea of writing it together .
 person of company: Martin J. Sherwin, Tufts University
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "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} 
Answer:
 person of company: Martin J. Sherwin, Tufts University