#postcard__postal_card__mailing-card__mailingcard  a card for sending messages by post without an envelope
  supertype:  #card.correspondence  a rectangular piece of stiff paper used to send messages (may have printed greetings or pictures); "they sent us a card from Miami"
  subtype:  #lettercard  a postcard that folds so the message is inside
  subtype:  #picture_postcard__picturepostcard  a postcard with a picture on one side

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