input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A patient comes to ER with headache describing it as worst headache in his life. What is the next step?   (A) CT brain   (B) Lumbar puncture   (C) MRI brain   (D) Observation and analgesics
output: ['(A) CT brain <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) CT brain  (B) Lumbar puncture  (C) MRI brain  (D) Observation and analgesics <> possible answers', '  A patient comes to ER with headache describing it as worst headache in his life. What is the next step? <> context']