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Organism
  Animalia
      Chordata
        Vertebrata
          Amniota
            Aves
                    Pelecaniformes
                            Pelecanidae
                                     Pelecanus
                                             Pelecanus erythrorhynchos
                                             Pelecanus occidentalis
                                               Pelecanus occidentalis carolinensis
                                               Pelecanus occidentalis occidentalis