( Water ( ( can ( occur ( in ( ( ( three states ) ( -LRB- ( forms -RRB- ) ) ) ( on Earth ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Water)) (VP (MD can) (VP (VB occur) (PP (IN in) (NP (NP (NP (CD three) (NNS states)) (PRN (-LRB- -LRB-) (NP (NNS forms)) (-RRB- -RRB-))) (PP (IN on) (NP (NNP Earth))))))) (. .)))
Water can occur in three states (forms) on Earth.
(ROOT (S (NP (NNP Water)) (VP (VBZ exists) (PP (IN on) (NP (NP (NN earth)) (PP (IN in) (NP (NP (CD three) (NN matter) (NNS states)) (VP (VBZ states))))))) (. .)))