The remaining parts of the north, although enticing, are difficult to explore.
( ( ( The ( remaining parts ) ) ( of ( the north ) ) ) ( ( , ( ( although enticing ) , ) ) ( ( are ( difficult ( to explore ) ) ) . ) ) )
(ROOT (S (NP (NP (DT The) (VBG remaining) (NNS parts)) (PP (IN of) (NP (DT the) (NN north)))) (PRN (, ,) (SBAR (IN although) (FRAG (ADJP (JJ enticing)))) (, ,)) (VP (VBP are) (ADJP (JJ difficult) (S (VP (TO to) (VP (VB explore)))))) (. .)))
The rest of the north presents a steep challenge.
( ( ( The rest ) ( of ( the north ) ) ) ( ( presents ( a ( steep challenge ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN rest)) (PP (IN of) (NP (DT the) (NN north)))) (VP (VBZ presents) (NP (DT a) (JJ steep) (NN challenge))) (. .)))