Individual #Benelux  a customs union comprising BElgium and NEtherlands and LUXembourg
  instance of:  #customs_union
  member:  #Belgium__Kingdom_of_Belgium__Belgique  a monarchy in northwestern Europe; headquarters for the European Common Market and for the North Atlantic Treaty Organization
     member:  #Belgian  a native or inhabitant of Belgium
     member:  #Fleming  a native of Flanders or a Flemish-speaking Belgian
     member:  #Walloon.Belgian__walloon  a member of the French-speaking people living in Belgium
  member:  #Netherlands__The_Netherlands__Kingdom_of_The_Netherlands__Holland__holland  a constitutional monarchy in western Europe on the North Sea; achieved independence from Spain in 1579; half the country lies below sea level
     member:  #Netherlander__Dutchman__Hollander  a native or inhabitant of Holland
  member:  #Luxembourg__Grand_Duchy_of_Luxembourg__Luxemburg  a grand duchy (a constitutional monarchy) landlocked in northwestern Europe between France and Belgium and Germany; an international financial center
     member:  #Luxemburger__Luxembourger  a native or inhabitant of Luxembourg

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