#male_horse  the male of species Equus caballus
  supertype:  #male  an animal that produces gametes (spermatozoa) that can fertilize female gametes (ova)
  subtype:  #stallion__entire  uncastrated adult male horse
     subtype:  #studhorse__stud  adult male horse kept for breeding
  subtype:  #gelding  castrated male horse

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