#yard__pace  a unit of length equal to 3 feet; defined as 91.44 centimeters; originally taken to be the average length of a stride
  supertype:  #linear_unit  a unit of measurement of length
  part:  #ft
  part of:  #perch.linear_unit__rod  (British) a linear measure of 16.5 feet
     part of:  #furlong  a unit of length equal to 220 yards
        part of:  #statute_mile__statutemile__mile__stat_mi__land_mile__mi  a unit of length equal to 1760 yards
           part of:  #league.linear_unit  an obsolete unit of distance of variable length (usually 3 miles)
  part of:  #chain.linear_unit  a unit of length
  part of:  #lea  a unit of length of thread or yarn
  part of:  #fthm__fathom  a linear unit of measurement (equal to 6 feet) for water depth

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