input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Syncope is usually caused by:   (A) Vasoconstriction   (B) Cerebral ischemia   (C) Cerebral hyperemia   (D) Decrease in the vascular bed
output: ['(B) Cerebral ischemia <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Vasoconstriction  (B) Cerebral ischemia  (C) Cerebral hyperemia  (D) Decrease in the vascular bed <> possible answers', '  Syncope is usually caused by: <> context']