( ( Describe ( ( the function ) ( of ( ( the ( reticular formations ) ) ( -LRB- ( ( Reticular ( Activating System ) ) -RRB- ) ) ) ) ) ) . )
(ROOT (S (VP (VB Describe) (NP (NP (DT the) (NN function)) (PP (IN of) (NP (NP (DT the) (NN reticular) (NNS formations)) (PRN (-LRB- -LRB-) (NP (NNP Reticular) (NNP Activating) (NNP System)) (-RRB- -RRB-)))))) (. .)))
Describe the function of the reticular formations (Reticular Activating System).
(ROOT (S (NP (JJ Reticular) (NN formation)) (VP (VBZ is) (NP (NP (DT the) (NN name)) (PP (IN of) (NP (NP (DT the) (NN formation)) (SBAR (WHNP (WDT that)) (S (VP (VBZ regulates) (NP (NN sleep) (CC and) (NN arousal))))))))) (. .)))