#runner.athlete  a trained athlete who competes in foot races
  supertype:  #athlete__jock  a person trained to compete in sports
  subtype:  #marathoner__marathon_runner__road_runner__long-distance_runner  someone who participates in long-distance races (especially in marathons)
  subtype:  #miler  a runner in a one-mile race
     subtype:  #four-minute_man  someone who has run the mile is less that 4 minutes
        instance:  #Sir_Roger_Gilbert_Bannister__Bannister__Roger_Bannister  #John_Walker__Walker
  subtype:  #sprinter  someone who runs a short distance at top speed
     instance:  #Frederick_Carleton_Lewis__Lewis__Carl_Lewis

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