( ( ( nervous ( system disorder ) ) 5 ) . )
(ROOT (NP (NP (JJ nervous) (NN system) (NN disorder)) (NP (CD 5)) (. .)))
nervous system disorder 5.
(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)))))) (. .)))