#swan  stately heavy-bodied aquatic bird with very long neck and usually white plumage as adult
  supertype:  #aquatic_bird__aquaticbird  wading and swimming and diving birds of either fresh or salt water
  subtype:  #coscoroba  #cob  #pen.swan  #cygnet  #mute_swan  #whooper_swan  #tundra_swan  #trumpeter_swan  #black_swan
  member of:  #family_Anatidae
  part:  #swan's_down  down of the swan

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