diurnal motion is when objects in the sky appear to move due to earth 's rotation on its axis
diurnal_animal is animal. if wind occurs then turn occurs. diurnal_variation is not variation. diurnal_animal is not animal. diurnal_variation is variation. turning is not movement. diurnal_animal is not tangible_thing. landing is when_plane_returns_to_earth. turning is movement. landing is not when_plane_returns_to_earth.