( It ( ( is ( ( a disorder ) ( of ( the ( central ( nervous system ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (NP (NP (DT a) (NN disorder)) (PP (IN of) (NP (DT the) (JJ central) (JJ nervous) (NN system))))) (. .)))
It is a disorder of the central nervous system.
(ROOT (S (NP (JJ Neurodevelopmental) (NNS disorders)) (VP (VBP happen) (SBAR (WHADVP (WRB when)) (S (NP (NP (NN development)) (PP (IN of) (NP (JJ nervous) (NN system)))) (VP (VBZ is) (ADJP (JJ disturbed)))))) (. .)))