mendes still does n't quite know how to fill a frame . 
(ROOT (S (NP (NNP mendes)) (ADVP (RB still)) (VP (VBZ does) (RB n't) (ADVP (RB quite)) (VP (VB know) (SBAR (WHADVP (WRB how)) (S (VP (TO to) (VP (VB fill) (NP (DT a) (NN frame)))))))) (. .)))
(ROOT (S (NP (NNP )) (ADVP (RB )) (VP (VBZ ) (RB ) (ADVP (RB )) (VP (VB ) (SBAR (WHADVP (WRB )) (S (VP (TO ) (VP (VB ) (NP (DT ) (NN )))))))) (. )))