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Op-Ed Contributor Bruce Bartlett , an official under Presidents Ronald Reagan and George H. W. Bush , is the author of '' Impostor : How George W. Bush Bankrupted America and Betrayed the Reagan Legacy . ''
 children: George H. W. Bush, George W. Bush
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:  George H. W. Bush, George W. Bush 
Answer:
 children: George H. W. Bush, George W. Bush