( Elements ( ( ( can not ) ( be ( split ( into ( ( simpler substances ) ( using ( normal ( chemical methods ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Elements)) (VP (MD can) (RB not) (VP (VB be) (VP (VBN split) (PP (IN into) (NP (NP (JJR simpler) (NNS substances)) (VP (VBG using) (NP (JJ normal) (NN chemical) (NNS methods)))))))) (. .)))
Elements cannot be split into simpler substances using normal chemical methods.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (DT a) (NN substance)) (SBAR (WHNP (WDT that)) (S (VP (MD can) (RB not) (VP (VB be) (VP (VBN broken) (PRT (RP down)) (PP (TO to) (NP (JJ other) (NNS substances))) (PP (IN by) (NP (NP (NN chemical) (NNS reactions)) (NP (DT an) (NN element))))))))))) (. .)))