#yard.spar  a long horizontal spar tapered at the end and used to support and spread a square sail or lateen
  supertype:  spar  a stout rounded pole of wood or metal used to support rigging
  subtype:  main_yard  yard for a square mainsail
  part of:  sailing_vessel
  part:  yardarm  either end of the yard of a square-rigged ship

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