( ( The brain ) ( , ( ( unlike ( the cord ) ) ( , ( ( has ( ( ( ( the ( gray matter ) ) ( on ( the outside ) ) ) and ) ( ( the ( white matter ) ) ( on ( the ( ( in - ) side ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (NP (DT The) (NN brain)) (, ,) (PP (IN unlike) (NP (DT the) (NN cord))) (, ,) (VP (VBZ has) (NP (NP (NP (DT the) (JJ gray) (NN matter)) (PP (IN on) (NP (DT the) (NN outside)))) (CC and) (NP (NP (DT the) (JJ white) (NN matter)) (PP (IN on) (NP (DT the) (ADJP (IN in) (NN -)) (NN side)))))) (. .)))
The brain, unlike the cord, has   the gray matter on the outside   and the white matter on the in-  side.
(ROOT (S (NP (NP (JJS Most)) (PP (IN of) (NP (DT the) (JJ gray) (NN matter)))) (VP (VBZ is) (PP (IN on) (NP (NP (DT the) (NN surface)) (PP (IN of) (NP (DT the) (NN brain))))) (, ,) (S (VP (VBG surrounding) (NP (JJ white) (NN matter))))) (. .)))