The disorder hardly seemed to exist before the stimulant Ritalin came along.
( ( The disorder ) ( hardly ( ( seemed ( to ( exist ( before ( ( the ( stimulant Ritalin ) ) ( came along ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (DT The) (NN disorder)) (ADVP (RB hardly)) (VP (VBD seemed) (S (VP (TO to) (VP (VB exist) (SBAR (IN before) (S (NP (DT the) (NN stimulant) (NN Ritalin)) (VP (VBD came) (PRT (RP along))))))))) (. .)))
Attention Deficit Disorder didn't seem as prevalent before Ritalin was around.
( ( Attention ( Deficit Disorder ) ) ( ( ( did n't ) ( ( seem ( as prevalent ) ) ( before ( Ritalin ( was around ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Attention) (NNP Deficit) (NNP Disorder)) (VP (VBD did) (RB n't) (VP (VB seem) (ADJP (RB as) (JJ prevalent)) (SBAR (IN before) (S (NP (NNP Ritalin)) (VP (VBD was) (ADVP (RB around))))))) (. .)))