#genus_Sterna__Sterna  a genus of Sterninae
  supertype:  #bird_genus  a genus of birds
  member:  #sea_swallow
  member of:  #subfamily_Sterninae__subfamilysterninae__Sterninae  terns
     member of:  #family_Laridae__Laridae  gull family: gulls and terns
        member of:  #suborder_Lari__Lari  gulls; terns; jaegers; skimmers
           member of:  #order_Charadriiformes__Charadriiformes  large diverse order of aquatic birds found along seacoasts and inland waters: shorebirds and coastal diving birds; most feed on anima life
              member of:  #class_Aves__Aves  birds
                 member of:  #subphylum_Vertebrata__Vertebrata__Craniata__subphylum_Craniata  fishes; amphibians; reptiles; birds; mammals
                    member of:  #phylum_Chordata__Chordata  comprises true vertebrates and animals having a notochord
                       member of:  #kingdom_Animalia__Animalia__animal_kingdom  taxonomic kingdom comprising all living or extinct animals

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