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Migrant workers in Moscow have long complained that their work and living conditions are abysmal , but the capital 's bustling economy has drawn them from throughout the impoverished corners of the former Soviet Union .
 country of capital: Soviet Union, Moscow
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:  Soviet Union, Moscow 
Answer:
 country of capital: Soviet Union, Moscow