The contrast between the landscape of the central highlands and the south coast could not be more marked.
( ( ( The contrast ) ( between ( ( the landscape ) ( of ( ( ( the ( central highlands ) ) and ) ( the ( south coast ) ) ) ) ) ) ) ( ( ( could not ) ( be ( more marked ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN contrast)) (PP (IN between) (NP (NP (DT the) (NN landscape)) (PP (IN of) (NP (NP (DT the) (JJ central) (NNS highlands)) (CC and) (NP (DT the) (JJ south) (NN coast))))))) (VP (MD could) (RB not) (VP (VB be) (ADJP (RBR more) (JJ marked)))) (. .)))
The contrast was unable to be marked.
( ( The contrast ) ( ( was ( unable ( to ( be marked ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN contrast)) (VP (VBD was) (ADJP (JJ unable) (S (VP (TO to) (VP (VB be) (VP (VBN marked))))))) (. .)))