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Mr. Bujones joined Ballet Theater in 1972 , and two years later he became the first American to win the gold medal at the International Ballet Competition in Varna , Bulgaria , a prestigious event until then dominated by Soviet dancers .
 Bulgaria, Varna
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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:
 Bulgaria, Varna