input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Extra-radicular source of persistent endodontic infection is?   (A) Propionobacterium   (B) E.fecalis   (C) V.parvula)   (D) T.denticola
output: ['(A) Propionobacterium <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Propionobacterium  (B) E.fecalis  (C) V.parvula)  (D) T.denticola <> possible answers', '  Extra-radicular source of persistent endodontic infection is? <> context']