seriously dumb characters , which somewhat dilutes the pleasure of watching them 
(ROOT (S (ADVP (RB seriously)) (NP (NP (JJ dumb) (NNS characters)) (, ,) (SBAR (WHNP (WDT which)) (S (ADVP (RB somewhat)) (VP (VBZ dilutes) (NP (NP (DT the) (NN pleasure)) (PP (IN of) (S (VP (VBG watching) (NP (PRP them))))))))))))
(ROOT (S (ADVP (RB )) (NP (NP (JJ ) (NNS )) (, ) (SBAR (WHNP (WDT )) (S (ADVP (RB )) (VP (VBZ ) (NP (NP (DT ) (NN )) (PP (IN ) (S (VP (VBG ) (NP (PRP ))))))))))))