#shaft.passageway  a vertical passageway through a building (as for an elevator)
  supertype:  passageway  a passage between rooms or between buildings
  part of:  edifice
  subtype:  elevator_shaft  a vertical shaft in a building to permit the passage of an elevator from floor to floor
  subtype:  ventilation_shaft__ventilationshaft  a shaft in a building; serves as an air passage for ventilation
  subtype:  well.shaft  an open shaft through the floors of a building (as for a stairway)
     subtype:  stairwell  a vertical well around which there is a stairway

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