Parents seemed unable to distinguish  good  from  substandard  care.
( Parents ( ( seemed ( unable ( to ( ( distinguish good ) ( from ( substandard care ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Parents)) (VP (VBD seemed) (ADJP (JJ unable) (S (VP (TO to) (VP (VB distinguish) (ADJP (JJ good)) (PP (IN from) (NP (JJ substandard) (NN care)))))))) (. .)))
As a result of parents' seeming inability to distinguish good from substandard care, substandard care became more prevalent.
( ( As ( ( a result ) ( of ( ( parents ' ) ( seeming ( inability ( to ( ( distinguish good ) ( from ( substandard care ) ) ) ) ) ) ) ) ) ) ( , ( ( substandard care ) ( ( became ( more prevalent ) ) . ) ) ) )
(ROOT (S (PP (IN As) (NP (NP (DT a) (NN result)) (PP (IN of) (NP (NP (NNS parents) (POS ')) (JJ seeming) (NN inability) (S (VP (TO to) (VP (VB distinguish) (ADJP (JJ good)) (PP (IN from) (NP (JJ substandard) (NN care)))))))))) (, ,) (NP (JJ substandard) (NN care)) (VP (VBD became) (ADJP (RBR more) (JJ prevalent))) (. .)))