26754
A year after membership , the Poles have not forgotten that after 50 years of Soviet domination , the main promise of their revolution of 1989 , which was the first major blow in the collapse of the Soviet Union , was to re-establish the country 's historic identity as a part of Europe .
 location contains: Europe, Soviet Union
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: 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} 
 Entity Pairs:  Europe, Soviet Union 
Answer:
 location contains: Europe, Soviet Union