( ( In ( pure water ) ) ( ( enough ( of ( the water ) ) ) ( ( dissociates ( to ( ( produce ( hydrogen ions ) ) ( in ( ( an amount ) ( which ( ( measures 7 ) ( on ( the ( pH scale ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN In) (NP (JJ pure) (NN water))) (NP (NP (RB enough)) (PP (IN of) (NP (DT the) (NN water)))) (VP (VBZ dissociates) (S (VP (TO to) (VP (VB produce) (NP (NN hydrogen) (NNS ions)) (PP (IN in) (NP (NP (DT an) (NN amount)) (SBAR (WHNP (WDT which)) (S (VP (VBZ measures) (NP (CD 7)) (PP (IN on) (NP (DT the) (NN pH) (NN scale)))))))))))) (. .)))
In pure water enough of the water dissociates to produce hydrogen ions in an amount which measures 7 on the pH scale.
(ROOT (S (NP (CD 7)) (VP (VBZ is) (NP (NP (DT the) (NN ph)) (PP (IN of) (NP (JJ pure) (NN water))))) (. .)))