( ( Stimulation ( of ( the ( parasympathetic system ) ) ) ) ( ( increases salivation ) . ) )
(ROOT (S (NP (NP (NNP Stimulation)) (PP (IN of) (NP (DT the) (JJ parasympathetic) (NN system)))) (VP (VBZ increases) (NP (NN salivation))) (. .)))
Stimulation of the parasympathetic system increases salivation.
(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)))))) (. .)))