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In December , he sang in Moscow to commemorate the 10th anniversary of Russia 's military campaign in Chechnya , an event to honor those '' directly involved in the establishment of constitutional order in the North Caucasus , '' according to RIA-Novosti , the Kremlin 's official news agency .
 Russia, Chechnya; Chechnya, Russia; Russia, Moscow; Moscow, Russia; Russia, Moscow; Russia, Moscow; Russia, Chechnya
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:
 Russia, Chechnya; Chechnya, Russia; Russia, Moscow; Moscow, Russia; Russia, Moscow; Russia, Moscow; Russia, Chechnya