#piece_of_leather  a piece of leather
  supertype:  #piece  #leather
  subtype:  #counter.piece_of_leather  piece of leather forming the back of a shoe or boot
  subtype:  #heel_counter__counter__heel  the piece of leather that fits the heel
  subtype:  #quarter.piece_of_leather  piece of leather that comprises the part of a shoe or boot covering the heel and joining the vamp
  subtype:  #saddle.piece_of_leather  a piece of leather across the instep of a shoe
  subtype:  #upper  piece of leather that forms the part of a shoe or boot above the sole
  subtype:  #vamp  piece of leather forming the front part of the upper of a shoe

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