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With respect to the committee 's specific question -- whether mergers and acquisitions in our industry have contributed to higher prices at the pump -- my answer is no , '' Rex W. Tillerson , Exxon Mobil 's chairman and chief executive since January , said in response to Senator Specter . ''
 person of company: Rex W. Tillerson, Exxon Mobil
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: Rex W. Tillerson, Exxon Mobil