input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Lower density usually means   (A) High strength   (B) Low strength   (C) Low melting temperature   (D) Lighter weight
output: ['(D) Lighter weight <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) High strength  (B) Low strength  (C) Low melting temperature  (D) Lighter weight <> possible answers', '  Lower density usually means <> context']