( pH ( ( is ( ( the measurement ) ( of ( ( acidity ( , ( alkalinity ( , ( or neutrality ) ) ) ) ) ( of ( ( a water ) ( based solution ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN pH)) (VP (VBZ is) (NP (NP (DT the) (NN measurement)) (PP (IN of) (NP (NP (NN acidity) (, ,) (NN alkalinity) (, ,) (CC or) (NN neutrality)) (PP (IN of) (NP (NP (DT a) (NN water)) (VP (VBN based) (NP (NN solution))))))))) (. .)))
pH is the measurement of acidity, alkalinity, or neutrality of a water based solution.
(ROOT (S (NP (NP (DT The) (NN acidity)) (PP (IN of) (NP (DT a) (NN solution)))) (VP (VBZ is) (ADVP (RB typically)) (VP (VBN assessed) (ADVP (RB experimentally)) (PP (IN by) (NP (NP (NN measurement)) (PP (IN of) (NP (PRP$ its) (NN ph.)))))))))