slap me , i saw this movie . 
(ROOT (S (S (VP (VB slap) (NP (PRP me)))) (, ,) (S (NP (PRP i)) (VP (VBD saw) (NP (DT this) (NN movie)))) (. .)))
(ROOT (S (S (VP (VB ) (NP (PRP )))) (, ) (S (NP (PRP )) (VP (VBD ) (NP (DT ) (NN )))) (. )))