( ( pH 7 ) ( ( ( ( is neutral ) , ) ( like ( pure water ) ) ) . ) )
(ROOT (S (NP (NN pH) (CD 7)) (VP (VBZ is) (ADJP (JJ neutral)) (, ,) (PP (IN like) (NP (JJ pure) (NN water)))) (. .)))
pH 7 is neutral, like 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))))))) (. .)))