( ( ( ( ( ( Aerobic respiration ) ( ( yields ( more energy ) ) ( than denitrification ) ) ) , ) so ) ( denitrification ( generally ( ( takes place ) ( in ( ( the absence ) ( of oxygen ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (JJ Aerobic) (NN respiration)) (VP (VBZ yields) (NP (JJR more) (NN energy)) (PP (IN than) (NP (NN denitrification))))) (, ,) (IN so) (S (NP (NN denitrification)) (ADVP (RB generally)) (VP (VBZ takes) (NP (NN place)) (PP (IN in) (NP (NP (DT the) (NN absence)) (PP (IN of) (NP (NN oxygen))))))) (. .)))
Aerobic respiration yields more energy than denitrification, so denitrification generally takes place in the absence of oxygen.
(ROOT (S (NP (JJ Aerobic) (NN respiration)) (VP (VBZ has) (NP (NP (DT the) (NN advantage)) (PP (IN of) (S (VP (VBG releasing) (NP (JJR more) (NN energy))))))) (. .)))