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) Atmosphere (Earth) - layer of air
                                   (Phenomenon) Cyclones
                                     (Event) 2011/2012 South-West Indian Ocean cyclone season
                                       01 (Tropical storm) Alenga (5 Dec 2011 - 7 Dec 2011)
                                       02 (Tropical cyclone) Benilde (25 Dec 2011 - 5 Jan 2012)
                                       03 (Tropical storm) Chanda (8 Jan 2012 - 11 Jan 2012)
                                       04 (Subtropical depression) Dando (11 Jan 2012 - 16 Jan 2012)
                                       05 (Tropical storm) Ethel (18 Jan 2012 - 23 Jan 2012)
                                       06 (Tropical cyclone) Funso (19 Jan 2012 - 28 Jan 2012)
                                       07 (Tropical cyclone) Giovanna (9 Feb 2012 - 21 Feb 2012)
                                       08 (Tropical storm) Hilwa (14 Feb 2012 - 22 Feb 2012)
                                       09 (Tropical storm) Irina (26 Feb 2012 – 10 Mar 2012)
                                       10 (Tropical storm) Koji-Joni (8 Mar 2012 - 12 Mar 2012)
                                       11 (Tropical storm) Kuena (5 Jun 2012 - 7 Jun 2012)