( ( Pure water ) ( ( has ( ( a pH ) ( of ( ( 7 , ) ( which ( is neutral ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Pure) (NN water)) (VP (VBZ has) (NP (NP (DT a) (NN pH)) (PP (IN of) (NP (NP (CD 7)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (ADJP (JJ neutral))))))))) (. .)))
Pure water has a pH of 7, which is 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))))))) (. .)))