These latter vast regions of forests, rivers, and mountains border the Indonesian state of Kalimantan and the oil-rich sultanate of Brunei.
( ( ( These ( latter ( vast regions ) ) ) ( of ( forests ( , ( rivers ( , ( and mountains ) ) ) ) ) ) ) ( ( border ( ( ( ( the ( Indonesian state ) ) ( of Kalimantan ) ) and ) ( ( the ( oil-rich sultanate ) ) ( of Brunei ) ) ) ) . ) )
(ROOT (S (NP (NP (DT These) (JJ latter) (JJ vast) (NNS regions)) (PP (IN of) (NP (NNS forests) (, ,) (NNS rivers) (, ,) (CC and) (NNS mountains)))) (VP (VB border) (NP (NP (NP (DT the) (JJ Indonesian) (NN state)) (PP (IN of) (NP (NNP Kalimantan)))) (CC and) (NP (NP (DT the) (JJ oil-rich) (NN sultanate)) (PP (IN of) (NP (NNP Brunei)))))) (. .)))
The region near the Indonesian border is flat and has sparse vegetation.
( ( ( The region ) ( near ( the ( Indonesian border ) ) ) ) ( ( ( ( is flat ) and ) ( has ( sparse vegetation ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN region)) (PP (IN near) (NP (DT the) (NNP Indonesian) (NN border)))) (VP (VP (VBZ is) (ADJP (JJ flat))) (CC and) (VP (VBZ has) (NP (JJ sparse) (NNS vegetation)))) (. .)))