#dirt_track  a racetrack that is not paved
  supertype:  #racetrack__racecourse__raceway__track  a course over which races are run
  subtype:  #Belmont_Park  a racetrack for horse racing in Elmont on Long Island; site of the Belmont Stakes
  subtype:  #Churchill_Downs  a racetrack for horse races in Louisville; site of the Kentucky Derby
  subtype:  #Pimlico  a racetrack for horse racing; site of the Preakness

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