( ( Describe ( ( the role ) ( of ( oxygen ( in ( ( the process ) ( of ( aerobic respiration ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Describe) (NP (NP (DT the) (NN role)) (PP (IN of) (NP (NP (NN oxygen)) (PP (IN in) (NP (NP (DT the) (NN process)) (PP (IN of) (NP (JJ aerobic) (NN respiration))))))))) (. .)))
Describe the role of oxygen in the process of aerobic respiration.
(ROOT (S (NP (NP (DT The) (NN structure)) (PP (IN of) (NP (NN mitochondrion)))) (VP (VBZ plays) (NP (NP (DT an) (JJ important) (NN role)) (PP (IN in) (NP (JJ aerobic) (NN respiration))))) (. .)))