#balloon  large tough non-rigid bag filled with gas or hot air
  supertype:  #lighter-than-air_craft  aircraft supported by its own buoyancy
  subtype:  #hot-air_balloon  #meteorological_balloon  #trial_balloon.balloon
  part:  #gasbag__envelope  the bag containing the gas in a balloon
  part:  #ripcord.cord  a cord that is pulled to open the gasbag of a balloon wide enough to release gas and so causes the balloon to descend

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