( ( ( ( ( ( ( ( ( Adverse Effects ) and ) ( Poisoning ( ( The properties ) ( of ( certain drugs ) ) ) ) ) , ) ( medicinal ( and ( biological substances ) ) ) ) or ) ( combinations ( of ( such substances ) ) ) ) , ) ( ( may ( cause ( toxic reactions ) ) ) . ) )
(ROOT (S (NP (NP (NP (JJ Adverse) (NNPS Effects)) (CC and) (S (VP (VBG Poisoning) (NP (NP (DT The) (NNS properties)) (PP (IN of) (NP (JJ certain) (NNS drugs))))))) (, ,) (NP (JJ medicinal) (CC and) (JJ biological) (NNS substances)) (CC or) (NP (NP (NNS combinations)) (PP (IN of) (NP (JJ such) (NNS substances)))) (, ,)) (VP (MD may) (VP (VB cause) (NP (JJ toxic) (NNS reactions)))) (. .)))
Adverse Effects and Poisoning The properties of certain drugs, medicinal and biological substances or combinations of such substances, may cause toxic reactions.
(ROOT (S (NP (DT A) (NN combination) (NN reaction)) (VP (VBZ is) (NP (NP (DT a) (NN reaction)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (CD two) (CC or) (JJR more) (NNS substances)) (VP (VBP combine) (S (VP (TO to) (VP (VB form) (NP (DT a) (JJ single) (JJ new) (NN substance)))))))))) (. .)))