Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       Caelum veter. - region of the fixed stars
         (Constellation) Sagittarius Cleostratus, 6th century BC - Sgr
           (Planetary system) OGLE-2006-BLG-109L system B.S. Gaudi et al., 2008
             1 (Star) OGLE-2006-BLG-109L B.S. Gaudi et al., 2008
             2 (Planet) OGLE-2006-BLG-109Lb B.S. Gaudi et al., 2008
             3 (Planet) OGLE-2006-BLG-109Lc B.S. Gaudi et al., 2008