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