(section
 ((id "what-conlangers-do"))
 (hgroup
  (h2 "what conlangers do")
  (p (em "moving from a pile of language stuff to a pile of problems to solve")))
 (p "")
 (section
  (hgroup
   (h3 "what's in a sound change rule?")
   (p (em "using previous work as a starting point")))
  ""))