input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Pregnancy gingivitis is caused by:   (A) Bacteriodes melaninogenicus   (B) Actinobacillus actinomycetemcomitans   (C) Streptococcus sanguis   (D) Fusobacterium
output: ['(A) Bacteriodes melaninogenicus <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Bacteriodes melaninogenicus  (B) Actinobacillus actinomycetemcomitans  (C) Streptococcus sanguis  (D) Fusobacterium <> possible answers', '  Pregnancy gingivitis is caused by: <> context']