( ( ( ( ( ( A cerebrum ) , ) cerebellum ) and ) ( a brain ) ) ( stem . ) )
(ROOT (S (NP (NP (DT A) (NN cerebrum)) (, ,) (NP (NN cerebellum)) (CC and) (NP (DT a) (NN brain))) (VP (VBP stem)) (. .)))
A cerebrum, cerebellum and a brain stem.
(ROOT (S (NP (NP (DT The) (NN cerebellum)) (PP (IN of) (NP (DT the) (NN brain)))) (VP (VBZ lies) (PP (PP (IN under) (NP (DT the) (NN cerebrum))) (CC and) (PP (IN behind) (NP (DT the) (NN brain) (NN stem))))) (. .)))