( ( In ( a ( chemical reaction ) ) ) ( , ( matter ( ( is ( neither ( ( created nor ) destroyed ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT a) (NN chemical) (NN reaction))) (, ,) (NP (NN matter)) (VP (VBZ is) (VP (RB neither) (VBN created) (CC nor) (VBN destroyed))) (. .)))
In a chemical reaction, matter is neither created nor destroyed.
(ROOT (S (NP (NNP Matter)) (VP (MD can) (RB not) (VP (VB be) (VP (VBN created) (CC or) (VBN destroyed) (PP (IN in) (NP (DT a) (NN chemical) (NN reaction)))))) (. .)))