( Slides ( either ( ( have ( ( ( ( ( a section ) ( of ( cerebellum ( and ( brain stem ) ) ) ) ) , ) or ) ( ( a section ) ( of cerebrum ) ) ) ) . ) ) )
(ROOT (S (NP (NNS Slides)) (ADVP (RB either)) (VP (VBP have) (NP (NP (NP (DT a) (NN section)) (PP (IN of) (NP (NN cerebellum) (CC and) (NN brain) (NN stem)))) (, ,) (CC or) (NP (NP (DT a) (NN section)) (PP (IN of) (NP (NN cerebrum)))))) (. .)))
Slides either have a section of cerebellum and brain stem, or a section of cerebrum.
(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))))) (. .)))