( ( ( The ( first stage ) ) ( of ( cellular respiration ) ) ) ( ( is glycolysis ) . ) )
(ROOT (S (NP (NP (DT The) (JJ first) (NN stage)) (PP (IN of) (NP (JJ cellular) (NN respiration)))) (VP (VBZ is) (ADJP (JJ glycolysis))) (. .)))
The first stage of cellular respiration is glycolysis.
(ROOT (S (NP (NNS Glycolysis)) (VP (VBZ is) (NP (NP (DT the) (JJ first) (NN stage)) (PP (IN of) (NP (JJ cellular) (NN respiration))))) (. .)))