#waterfall__falls__fall__cascade__cataract  a steep descent of the water of a river
  supertype:  #body_of_water__water  the part of the earth's surface covered with water (such as a river or lake or ocean); "they invaded our territorial waters"; "they were sitting by the water's edge"
  instance:  #American_Falls  #Angel_Falls  #Canadian_Falls  #Cuquenan_Falls  #Iguazu_Falls  #Paulo_Afonso_Falls  #Sete_Quedas  #Tugela_Falls  #Twin_Falls.Snake_River  #Urubupunga_Falls  #Victoria_Falls  #Yosemite_Falls
  part of:  #river
  subtype:  #Niagara__Niagara_Falls  waterfall in Canada is the Horseshoe Falls; in the United States it is the American Falls
  subtype:  #Takkakaw  the highest waterfall in Canada

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