( Water ( ( is ( ( the ( only ( natural substance ) ) ) ( which ( exists ( in ( ( all ( three states ) ) ( of ( matter ( in nature ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Water)) (VP (VBZ is) (NP (NP (DT the) (RB only) (JJ natural) (NN substance)) (SBAR (WHNP (WDT which)) (S (VP (VBZ exists) (PP (IN in) (NP (NP (DT all) (CD three) (NNS states)) (PP (IN of) (NP (NP (NN matter)) (PP (IN in) (NP (NN nature)))))))))))) (. .)))
Water is the only natural substance which exists in all three states of matter in nature.
(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))))))) (. .)))