( ( The ( Parasympathetic ( Nervous System ) ) ) ( ( is ( involved ( in relaxation ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP Parasympathetic) (NNP Nervous) (NNP System)) (VP (VBZ is) (VP (VBN involved) (PP (IN in) (NP (NN relaxation))))) (. .)))
The Parasympathetic Nervous System is involved in relaxation.
(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)))))) (. .)))