Individual #Caspian_Sea__Caspian  a large saltwater lake between Iran and Russia fed by the Volga River; the largest inland body of water in the world
  instance of:  lake
  part of:  Iran__Islamic_Republic_of_Iran__Persia  a theocratic republic in the Middle East in western Asia; Iran was the core of the ancient Persian Empire and was known as Persia until 1935; rich in oil
     part of:  Middle_East__Near_East  the area around the eastern Mediterranean; from Turkey to North Africa and eastward to Iran; the site of such ancient civilizations as Phoenicia and Babylon and Egypt and the birthplace of Judaism and Christianity and Islam; "the Middle East is the cradle of Western civilization"
     part of:  Asia  the largest continent with 60% of the earth's population; it is joined to Europe on the west to form Eurasia; it is the site of some of the world's earliest civilizations
        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
  part of:  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
     part of:  Eurasia  the land mass formed by the continents of Europe and Asia

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