Individual #Sumatra  a mountainous island in western Indonesia
  instance of:  #island
  part:  #Medan
  member:  #Sumatran
  part of:  #Indonesia__Republic_of_Indonesia__Dutch_East_Indies  a republic in southeastern Asia on an archipelago including more than 13,000 islands; achieved independence from the Netherlands in 1945; the principal oil producer in the Far East and Pacific regions
     part of:  #Southeast_Asia  a geographical division of Asia that includes Indochina plus Indonesia and the Philippines and Singapore
        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:  #Austronesia  islands of central and South Pacific (Indonesia and Melanesia and Micronesia and Polynesia)
        part of:  #Pacific_Ocean__Pacific  the largest ocean in the world

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