( and ( catalysts ( ( ( accelerate ( the reaction ) ) also ) . ) ) )
(ROOT (S (CC and) (NP (NNS catalysts)) (VP (VB accelerate) (NP (DT the) (NN reaction)) (ADVP (RB also))) (. .)))
and catalysts accelerate the reaction also.
(ROOT (S (SBAR (IN If) (S (NP (DT a) (NN catalyst)) (VP (VBZ runs) (PRT (RP out))))) (, ,) (NP (DT the) (NN reaction)) (VP (VBZ slows)) (. .)))