( Acetylcholine ( ( plays ( ( numerous roles ) ( in ( the ( nervous system ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Acetylcholine)) (VP (VBZ plays) (NP (NP (JJ numerous) (NNS roles)) (PP (IN in) (NP (DT the) (JJ nervous) (NN system))))) (. .)))
Acetylcholine plays numerous roles in the nervous system.
(ROOT (S (NP (DT The) (JJ nervous) (NN system)) (VP (VBZ plays) (NP (NP (DT a) (JJ critical) (NN role)) (PP (IN in) (NP (NP (DT the) (NN regulation)) (PP (IN of) (NP (NN vascular) (NNS homeostasis))))))) (. .)))