( ( ( DISPOSAL Disposing ) ( of ( ( used ( motor oil ) ) ( by ( ( ( ( ( ( ( pouring it ) ( into ( storm ( or ( sewer drains ) ) ) ) ) , ) ( ( dumping it ) ( onto ( the ground ) ) ) ) , ) or ) ( ( placing it ) ( with ( household trash ) ) ) ) ) ) ) ) ( ( may ( ( create risks ) ( to ( ( ( human health ) and ) ( the environment ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP DISPOSAL) (NNP Disposing)) (PP (IN of) (NP (NP (JJ used) (NN motor) (NN oil)) (PP (IN by) (S (VP (VP (VBG pouring) (NP (PRP it)) (PP (IN into) (NP (NN storm) (CC or) (NN sewer) (NNS drains)))) (, ,) (VP (VBG dumping) (NP (PRP it)) (PP (IN onto) (NP (DT the) (NN ground)))) (, ,) (CC or) (VP (VBG placing) (NP (PRP it)) (PP (IN with) (NP (NN household) (NN trash)))))))))) (VP (MD may) (VP (VB create) (NP (NNS risks)) (PP (TO to) (NP (NP (JJ human) (NN health)) (CC and) (NP (DT the) (NN environment)))))) (. .)))
DISPOSAL Disposing of used motor oil by pouring it into storm or sewer drains, dumping it onto the ground, or placing it with household trash may create risks to human health and the environment.
(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)))))))))) (. .)))