( ( Water Water ) ( ( is ( ( a ( liquid oxide ) ) ( of hydrogen ) ) ) . ) )
(ROOT (S (NP (NNP Water) (NNP Water)) (VP (VBZ is) (NP (NP (DT a) (JJ liquid) (NN oxide)) (PP (IN of) (NP (NN hydrogen))))) (. .)))
Water Water is a liquid oxide of hydrogen .
(ROOT (S (NP (NNP Water)) (VP (VBZ is) (NP (NP (DT an) (NN oxide)) (PP (IN of) (NP (NN hydrogen))))) (. .)))