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 Ronald Reagan was ridiculed by sophisticated people on the American left and in Europe for labeling the Soviet Union and its allies an '' evil empire '' and for challenging Mikhail Gorbachev not just to reform his system but also to '' tear down this wall . '' 
 Mikhail Gorbachev, Soviet Union
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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} 
Answer:
 Mikhail Gorbachev, Soviet Union