#mast  a vertical spar for supporting sails
  supertype:  #spar  a stout rounded pole of wood or metal used to support rigging
  subtype:  #foremast  #jiggermast  #jury_mast  #mainmast  #mizzenmast  #topmast
  part of:  #sailing_vessel
  part:  #masthead  the head or top of a mast

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