( ( The ( polar ( ice caps ) ) ) ( ( are ( melted ( to ( allow ( the ( water ( to ( flow ( in ( ( the ( ( canals and ) riverbeds ) ) ( -LRB- ( ( ( Beige ( Planet Mars ) ) ( p. 2 ) ) -RRB- ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ polar) (NN ice) (NNS caps)) (VP (VBP are) (VP (VBN melted) (S (VP (TO to) (VP (VB allow) (NP (DT the) (NN water) (S (VP (TO to) (VP (VB flow) (PP (IN in) (NP (NP (DT the) (NNS canals) (CC and) (NNS riverbeds)) (PRN (-LRB- -LRB-) (NP (NP (NNP Beige) (NNP Planet) (NNP Mars)) (NP (NN p.) (CD 2))) (-RRB- -RRB-))))))))))))) (. .)))
The polar ice caps are melted to allow the water to flow in the canals and riverbeds ( Beige Planet Mars p.2).
(ROOT (S (NP (NNP Water)) (VP (VBZ takes) (NP (NP (DT the) (NN form)) (PP (IN of) (NP (NN ice)))) (PP (IN on) (NP (NN planet) (NNS mars)))) (. .)))