Individual #Aden  chief port of Yemen; located on the Gulf of Aden; its strategic location have made it a major trading center of southern Arabia since ancient times
  instance of:  #city  #port
  part of:  #Yemen__Republic_of_Yemen  a republic on the southwestern corner of the Arabian Peninsula on the Indian Ocean; formed in 1990 when North Yemen and South Yemen merged
     part of:  #Arabian_Peninsula__Arabia  a peninsula between the Red Sea and the Persian Gulf; strategically important for its oil resources
        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:  pm#Mediterranean_region

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