#pony  a range horse of the western United States
  supertype:  #horse__Equus_caballus  solid-hoofed herbivorous quadruped domesticated since prehistoric times
  subtype:  #mustang  small hardy range horse of the western plains descended from horses brought by the Spanish
     subtype:  #bronco__bronc__broncho  an unbroken or imperfectly broken mustang
        subtype:  #bucking_bronco__buckingbronco  a vicious or unbreakable bronco
  subtype:  #cayuse__Indian_pony  a small native range horse

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