Individual #USSR__Soviet_Union__Russia__Union_of_Soviet_Socialist_Republics  a former communist country in eastern Europe and northern Asia; established in 1922; included Russia and 14 other soviet socialist republics (Ukraine and Byelorussia an others); officially dissolved 31 December 1991
  instance of:  country
  part:  February_Revolution  Russian_Revolution  Soviet_Socialist_Republic  Soviet_Russia  Caspian_Sea
  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

No statement uses or specializes USSR; click here to add one.