input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Couinaud classified liver into 8 segments,which structure differentiates the segments anatomically   (A) Poal vein   (B) Hepatic vein   (C) Bile duct   (D) Hepatic aery
output: ['(B) Hepatic vein <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Poal vein  (B) Hepatic vein  (C) Bile duct  (D) Hepatic aery <> possible answers', '  Couinaud classified liver into 8 segments,which structure differentiates the segments anatomically <> context']