Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       Astra Plinius - celestial bodies
         Universe
           (Supercluster) Virgo-Hydra-Centaurus Supercluster
             (Supercluster) Virgo Supercluster
               (Cluster) Local Group
                 (Galaxy) Milky Way Galaxy veter.
                   (Spiral arm) Orion Arm
                     (Region) Local Bubble
                       Local Interstellar Cloud
                         (Planetary system) Solar System
                           (Planet-satellite system) Earth System
                             (Planet) Earth veter.
                               "spheres" (Earth)
                                 (Sphere) Hydrosphere (Earth) - layer of water
                                   (Drainage basin) Arctic Ocean Basin
                                     (Drainage basin) Yenisei River Basin (Asia)
                                       0 (Stream) Yenisei River (Asia)
                                       1t.654800N0880400E (Stream) Nizhnyaya Tunguska (Russia)
                                       2t.613534N0900756E (Stream) Podkamennaya Tunguska (Russia)
                                       3t.1 (Stream) Angara River (Asia)
                                       3t.2 (Drainage basin) Lake Baikal Basin (Asia)