9573
 The Western powers continued to back the '' unpleasant but , without a doubt , necessary and timely step , '' after the war , as both a way to gain diplomatic clout with the Soviet Union and to ensure the security in postwar Europe . 
 Europe, 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:
 Europe, Soviet Union