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

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