#cantilever_bridge  bridge constructed of two cantilevers that meet in the middle
  supertype:  #bridge__span  a structure that allows people or vehicles to cross an obstacle such as a river or canal or railway etc.
  subtype:  #Baton_Rouge_Bridge  a cantilever bridge across the Mississippi at Baton Rouge
  subtype:  #Commodore_John_Barry_Bridge  a cantilever bridge in Chester, Pennsylvania
  subtype:  #Greater_New_Orleans_Bridge  twin cantilever bridges across the Mississippi at New Orleans
  subtype:  #Minato_Ohashi_Bridge  cantilever bridge at Osaka, Japan
  subtype:  #Quebec_Bridge  a cantilever bridge in Quebec
  subtype:  #Queensboro_Bridge  a cantilever bridge across the East River between Manhattan and Queens
  subtype:  #Tappan_Zee_Bridge  a cantilever bridge across the Hudson River

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