#corridor  an enclosed passageway; rooms usually open onto it
  supertype:  #passageway  a passage between rooms or between buildings
  subtype:  #gallery.corridor  a covered corridor (especially one extending along the wall of a building and supported with arches or columns)
  subtype:  #hallway__hall  an interior passage or corridor onto which rooms open; "the elevators were at the end of the hall"
     subtype:  #concourse  a wide hallway in a building where people can walk

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