( ( An enzyme ) ( ( is ( ( a protein ) ( produced ( by ( ( a ( living organism ) ) ( that ( functions ( as ( a ( biological catalyst ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT An) (NN enzyme)) (VP (VBZ is) (NP (NP (DT a) (NN protein)) (VP (VBN produced) (PP (IN by) (NP (NP (DT a) (VBG living) (NN organism)) (PP (IN that) (NP (NP (NNS functions)) (PP (IN as) (NP (DT a) (JJ biological) (NN catalyst)))))))))) (. .)))
An enzyme is a protein produced by a living organism that functions as a biological catalyst.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (NNS catalysts)) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (VP (VBN found) (ADVP (RB inside)) (PP (IN of) (S (VP (VBG living) (NP (NNS things) (NNS enzymes))))))))))) (. .)))