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G.M. has been pressing the union to agree to concessions in health care benefits , but talks between the two sides have been complicated by the emergence of a third party , Delphi , a supply giant that is a former division of G.M. Delphi 's new chief executive , Robert S. Miller , has threatened to file for bankruptcy protection unless G.M. and the union agree to what could amount to a costly bailout .
 person of company: Robert S. Miller, Delphi
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:  Robert S. Miller, Delphi 
Answer:
 person of company: Robert S. Miller, Delphi