#curb_roof  a roof with two or more slopes on each side of the ridge
  supertype:  roof  a protective covering that covers or forms the top of a building
  subtype:  mansard_roof__mansardroof__mansard  a hip roof having two slopes on each side
     subtype:  French_roof  a mansard roof with sides that are nearly perpendicular

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