input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following is the most common organism found in retreatment cases of periapical abscess?   (A) E. faecalis   (B) Trepenoma denticola   (C) S. mutans   (D) Actinomyces
output: ['(A) E. faecalis <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) E. faecalis  (B) Trepenoma denticola  (C) S. mutans  (D) Actinomyces <> possible answers', '  Which of the following is the most common organism found in retreatment cases of periapical abscess? <> context']