( ( Acids ( with ( ( a ( low pH ) ) ( -LRB- ( ( ( nearest to ) 1 ) -RRB- ) ) ) ) ) ( ( are ( very acid ) ) . ) )
(ROOT (S (NP (NP (NNS Acids)) (PP (IN with) (NP (NP (DT a) (JJ low) (NN pH)) (PRN (-LRB- -LRB-) (NP (QP (CD nearest) (TO to) (CD 1))) (-RRB- -RRB-))))) (VP (VBP are) (ADJP (RB very) (JJ acid))) (. .)))
Acids with a low pH (nearest to 1) are very acid.
(ROOT (S (NP (NNS Acids)) (VP (VBP are) (VP (VBN associated) (PP (IN with) (NP (NP (DT a) (JJ low) (NN number)) (PP (IN on) (NP (DT the) (NN ph) (NN scale))))))) (. .)))