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It 's certainly very unusual to have even retired military officers being this public about their opposition , '' said Christopher F. Gelpi , a Duke University political scientist and co-author -- with Peter D. Feaver , now a White House adviser -- of a 2004 book on civil-military relations . ''
 person of company: Peter D. Feaver, Duke 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:  Peter D. Feaver, Duke University 
Answer:
 person of company: Peter D. Feaver, Duke University