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 That is because in a newly united and integrated Europe , former Communist countries like Poland have a much greater interest in keeping the social welfare , subsidies and economic boon they get by tying themselves to Europe than any advantage they might gain by heading off on a new military venture with the United States . '' 
 location contains: Europe, Poland
Given options, please tell me the relationships of all the listed entity pairs.Output format is "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} 
 Entity Pairs:  Europe, Poland 
Answer:
 location contains: Europe, Poland