it will guarantee to have you leaving the theater with a smile on your face . 
(ROOT (S (NP (PRP it)) (VP (MD will) (VP (VB guarantee) (S (VP (TO to) (VP (VB have) (S (NP (PRP you)) (VP (VBG leaving) (NP (DT the) (NN theater)) (PP (IN with) (NP (NP (DT a) (NN smile)) (PP (IN on) (NP (PRP$ your) (NN face)))))))))))) (. .)))
(ROOT (S (NP (PRP )) (VP (MD ) (VP (VB ) (S (VP (TO ) (VP (VB ) (S (NP (PRP )) (VP (VBG ) (NP (DT ) (NN )) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (PRP$ ) (NN )))))))))))) (. )))