( ( The ( sympathetic system ) ) ( ( develops ( before ( the ( parasympathetic system ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ sympathetic) (NN system)) (VP (VBZ develops) (PP (IN before) (NP (DT the) (JJ parasympathetic) (NN system)))) (. .)))
The sympathetic system develops before the parasympathetic system.
(ROOT (S (NP (DT The) (JJ parasympathetic) (NN system)) (VP (MD can) (ADVP (RB also)) (VP (VB be) (VP (VBN referred) (S (VP (TO to))) (PP (IN as) (NP (DT the) (JJ craniosacral) (NN system)))))) (. .)))