Which of the following doesn't divide liver into 2 halves?

Poal vein, Hepatic aery and Common bile duct are involved in the division of the liver. From a surgical point of view, the liver is divided into right and left lobes of almost equal size by a major fissure (Cantlie's line) running from the gallbladder fossa in front to the IVC fossa behind. This division is based on the right and left branches of the hepatic aery and the poal vein, with tributaries of bile (hepatic) ducts following.Each lobe is divided into 2 sectors. The right hepatic vein (RHV) divides the right lobe into anterior and posterior sectors; the left hepatic vein (LHV) divides the left lobe into medial (quadrate) and lateral sectors. The sectors are fuher divided into segments; each segment has its own blood supply and biliary drainage.