#poster__posting__placard__bill__card  a sign posted in a public place as an advertisement; "a poster advertised the coming attractions"
  supertype:  #sign.communication  a public display of a (usually written) message; "he posted signs in all the shop windows"
  subtype:  #show_bill__show_card__theatrical_poster  a poster advertising a show or play
  subtype:  #flash_card__flashcard  a card with words or numbers of pictures that are flashed to a class by the teacher

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