( ( ( A unit ) ( of measurement ) ) ( ( ( ( ( called ( pH ( is ( used ( to ( record ( whether ( ( a substance ) ( is ( ( ( ( ( acidic , ) alkaline ) , ) or ) neutral ) ) ) ) ) ) ) ) ) ) , ) and ) ( also ( determines ( ( the strength ) ( of ( ( acidity or ) alkalinity ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT A) (NN unit)) (PP (IN of) (NP (NN measurement)))) (VP (VP (VBD called) (SBAR (S (NP (NN pH)) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB record) (SBAR (IN whether) (S (NP (DT a) (NN substance)) (VP (VBZ is) (ADJP (ADJP (JJ acidic)) (, ,) (ADJP (JJ alkaline)) (, ,) (CC or) (ADJP (JJ neutral)))))))))))))) (, ,) (CC and) (VP (ADVP (RB also)) (VBZ determines) (NP (NP (DT the) (NN strength)) (PP (IN of) (NP (NN acidity) (CC or) (NN alkalinity)))))) (. .)))
A unit of measurement called pH is used to record whether a substance is acidic, alkaline, or neutral, and also determines the strength of acidity or alkalinity.
(ROOT (S (NP (PRP You)) (VP (VBP call) (S (NP (NP (DT a) (NN substance)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (RB not) (NP (NP (DT an) (NN acid)) (CC or) (NP (DT a) (NN base))))))) (ADJP (JJ neutral)))) (. .)))