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It is also generally held that if the war did not produce an outright defeat for China , it was a costly mistake fought for dubious purposes , high among them punishing Vietnam for overthrowing the Khmer Rouge leader of Cambodia , Pol Pot , a Chinese ally who was one of the 20th century 's bloodiest tyrants .
 nationality: Pol Pot, Cambodia; place of death: Pol Pot, Cambodia
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:
 nationality: Pol Pot, Cambodia; place of death: Pol Pot, Cambodia