( ( Many others ) ( ( will ( ( experience ( a ( marked decrease ) ) ) ( in ( seizure frequency ) ) ) ) . ) )
(ROOT (S (NP (JJ Many) (NNS others)) (VP (MD will) (VP (VB experience) (NP (DT a) (JJ marked) (NN decrease)) (PP (IN in) (NP (NN seizure) (NN frequency))))) (. .)))
Many others will experience a marked decrease in seizure frequency.
(ROOT (S (NP (PRP You)) (ADVP (NP (NP (NN decrease) (NNS errors)) (PP (IN in) (NP (DT an) (NN experiment)))) (IN by)) (VP (VBP take) (NP (JJ many) (NNS measurements))) (. .)))