input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** The principal central action of caffeine is on the:   (A) Cerebral cortex   (B) Corpus callosum   (C) Hypothalamus   (D) Spinal cord
output: ['(A) Cerebral cortex <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Cerebral cortex  (B) Corpus callosum  (C) Hypothalamus  (D) Spinal cord <> possible answers', '  The principal central action of caffeine is on the: <> context']