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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 . '' 
 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: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
 Entity Pairs:  Peter D. Feaver, Duke University 
Answer:
 company: Peter D. Feaver, Duke University