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 . 
 location contains: Europe, Soviet Union
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: 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:
 location contains: Europe, Soviet Union