( ( Pyruvic acid ) ( ( is ( then ( ( needed ( for ( ( the ( other steps ) ) ( of ( cellular respiration ) ) ) ) ) ( to proceed ) ) ) ) . ) )
(ROOT (S (NP (JJ Pyruvic) (NN acid)) (VP (VBZ is) (VP (ADVP (RB then)) (VBN needed) (PP (IN for) (NP (NP (DT the) (JJ other) (NNS steps)) (PP (IN of) (NP (JJ cellular) (NN respiration))))) (S (VP (TO to) (VP (VB proceed)))))) (. .)))
Pyruvic acid is then needed for the other steps of cellular respiration to proceed.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (JJ cellular) (NN respiration)) (SBAR (WHNP (WDT that)) (S (VP (VBZ does) (RB not) (VP (VB need) (NP (NN oxygen)) (S (VP (TO to) (VP (VB proceed) (NP (JJ anaerobic) (NN respiration))))))))))) (. .)))