#short_ton__shortton__ton__net_ton__netton  a United States unit of weight equivalent to 2000 pounds
  supertype:  avoirdupois_unit__avoirdupoisunit  any of the units of the avoirdupois system of weights
  part:  short_hundredweight
  part of:  kiloton.avoirdupois_unit  one thousand tons
     part of:  megaton.avoirdupois_unit  one million tons

No statement uses or specializes short_ton; click here to add one.