(CONDITIONTYPE ORIENTED)
(VAR x)
(RULES
  a -> c
  a -> d
  b -> c
  b -> d
  f(x) -> x | x == c
  g(x, x) -> h(x, x)
  h(x, f(x)) -> x
)
(COMMENT
  \cite{G14}, example 42
  PhD Thesis, not yet published
)