( ( The ( brain stem ) ) ( ( ( ( is ( ( the ( bottom ( most portion ) ) ) ( of ( the brain ) ) ) ) , ) ( ( connecting ( the cerebrum ) ) ( with ( the ( spinal cord ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN brain) (NN stem)) (VP (VBZ is) (NP (NP (DT the) (JJ bottom) (JJS most) (NN portion)) (PP (IN of) (NP (DT the) (NN brain)))) (, ,) (S (VP (VBG connecting) (NP (DT the) (NN cerebrum)) (PP (IN with) (NP (DT the) (JJ spinal) (NN cord)))))) (. .)))
The brain stem is the bottom most portion of the brain, connecting the cerebrum with the spinal cord.
(ROOT (S (NP (NP (DT The) (JJ iconic) (JJ gray) (NN mantle)) (PP (IN of) (NP (DT the) (JJ human) (NN brain))) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ appears) (S (VP (TO to) (VP (VB make) (PRT (RP up)) (NP (NP (JJS most)) (PP (IN of) (NP (NP (DT the) (NN mass)) (PP (IN of) (NP (DT the) (NN brain)))))))))))) (, ,)) (VP (VBZ is) (VP (VBN called) (NP (DT the) (NN cerebrum)))) (. .)))