Simple

;; An SXML is one of: 
;;  -- empty 
;;  -- (cons String SXML)
;;  -- (cons SXML SXML)
;; 
;; interpretation: an SXML represents a blockquote;
;; nested SXMLs represent nested blockquotes

Solution:

Grader: Dimitri

;; [PTS: 2 (or 0) correctness]
'("a"
  "b"
  ("c"
   "d")
  "e")

;; or

(list "a"
      "b"
      (list "c"
            "d")
      "e")

;; or 

(cons "a"
  (cons "b"
    (cons (cons "c" (cons "d" empty))
      (cons "e" empty))))