** example w/o source name
   :PROPERTIES:
   :DATE:     2010-07-12
   :END:

delete emacs-lisp below for errors
#+begin_src emacs-lisp
  (* (+ 1 1 1) (+ 1 1 1) (+ 1 1 1) (+ 1 1 1) (+ 1 1 1) (+ 1 1 1) (+ 1 1 1))
#+end_src