( ( ( ( 7 , ) ( the ( neutral point ) ) ) , ) ( ( is ( ( the pH ) ( of ( pure water ) ) ) ) . ) )
(ROOT (S (NP (NP (CD 7)) (, ,) (NP (DT the) (JJ neutral) (NN point)) (, ,)) (VP (VBZ is) (NP (NP (DT the) (NN pH)) (PP (IN of) (NP (JJ pure) (NN water))))) (. .)))
7, the neutral point, is the pH of pure water.
(ROOT (S (NP (NNP Water)) (VP (VBZ is) (PP (IN at) (NP (NP (DT the) (NN neutrality)) (, ,) (NP (NP (CD 7) (NN point)) (PP (IN on) (NP (DT the) (NN ph) (NN scale))))))) (. .)))