#flexible_joint__hinge  a joint that holds two parts together so that one can swing relative to the other
  supertype:  joint  junction by which parts or objects are joined together
  subtype:  butt_hinge  strap_hinge  tee_hinge
  part:  pintle
  part of:  bi-fold_door  an interior door
  part of:  car_door__cardoor  the door of a car
     part of:  car__auto__automobile__machine__motorcar  4-wheeled motor vehicle; usually propelled by an internal combustion engine; "he needs a car to get to work"
  part of:  exterior_door__outside_door__outsidedoor  a doorway that allows entrance to or exit from a building
     part of:  edifice__building  a structure that has a roof and walls and stands more or less permanently in one place; "there was a three-story building on the corner"; "it was an imposing edifice"
  part of:  French_door  a light door with transparent or glazed panels extending the full length
  part of:  gate  a door-like movable barrier in a fence or wall
  part of:  swing_door__swingdoor__swinging_door  a door that swings on a double hinge; opens in either direction

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