( Rain ( ( can ( ( wash ( ( ( ( ( oil , ) grease ) , ) and ) substances ) ) ( into ( the ( storm ( drain system ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN Rain)) (VP (MD can) (VP (VB wash) (NP (NP (NN oil)) (, ,) (NP (NN grease)) (, ,) (CC and) (NP (NNS substances))) (PP (IN into) (NP (DT the) (NN storm) (NN drain) (NN system))))) (. .)))
Rain can wash oil, grease, and substances into the storm drain system.
(ROOT (S (NP (NNP Motor) (NN oil)) (VP (VBZ is) (NP (NP (DT a) (JJ harmful) (NN substance)) (SBAR (WHNP (WDT that)) (S (VP (MD must) (RB not) (VP (VB be) (VP (VBN drained) (PP (IN into) (NP (DT a) (NN storm) (NN sewer)))))))))) (. .)))