Individual #North_Sea  an arm of the North Atlantic between the British Isles and Scandinavia; oil was discovered under the North Sea in 1970
  instance of:  sea
  part of:  Atlantic_Ocean
  part:  Orkney_Islands  an archipelago of about 70 islands in the North Atlantic and North Sea off the northeastern coast of Scotland

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