#greeting_card  a card sent to express personal greetings
  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:  #birthday_card  a card expressing a birthday greeting
  subtype:  #Christmas_card  a card expressing a Christmas greeting
  subtype:  #Easter_card  a card expressing an Easter greeting
  subtype:  #Valentine  a card sent or given (as to a sweetheart) on Saint Valentine's Day

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