( ( ( ( water and ) ice ) ( on Mars ) ) ; )
(ROOT (NP (NP (NN water) (CC and) (NN ice)) (PP (IN on) (NP (NNP Mars))) (: ;)))
water and ice on Mars;
(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)))) (. .)))