( ( ( The pH ) ( of ( tap water ) ) ) ( ( is ( ( ( ( about ( pH 7 ) ) , ) or ) neutral ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN pH)) (PP (IN of) (NP (NN tap) (NN water)))) (VP (VBZ is) (NP (NP (QP (RB about) (CD pH) (CD 7))) (, ,) (CC or) (NP (JJ neutral)))) (. .)))
The pH of tap water is about pH 7, or neutral.
(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))))))) (. .)))