Individual #Volga_River__Volga  a Russian river; the longest river in Europe; flows into the Caspian Sea
  instance of:  #river
  part of:  #Russia__Russian_Federation  a federation in northeastern Europe and northern Asia; formerly Soviet Russia; since 1991 an independent state
     part of:  #Eurasia  the land mass formed by the continents of Europe and Asia
        part of:  #eastern_hemisphere__easternhemisphere__orient  the hemisphere that includes Eurasia and Africa and Australia
        part of:  #northern_hemisphere  the hemisphere north of the equator

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