#walnut  nut of any of various walnut trees having a wrinkled two-lobed seed with a hard shell
  supertype:  #edible_nut  a hard-shelled seed consisting of an edible kernel or meat enclosed in a woody or leathery shell
  part of:  #walnut_tree
  subtype:  #black_walnut__blackwalnut  American walnut having a very hard and thick woody shell
  subtype:  #English_walnut  nut with a wrinkled two-lobed seed and hard but relatively thin shell; widely used in cooking

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