#foal  a young horse
  supertype:  #young_mammal__youngmammal  any immature mammal
  member of:  #horse
  subtype:  #filly  a young female horse under the age of four
  subtype:  #colt  a young male horse under the age of four
     subtype:  #ridgeling__ridgling__ridgel__ridgil  a colt with undescended testicles

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