) ensure that the film is never dull 
(ROOT (S (-RRB- -RRB-) (VP (VB ensure) (SBAR (IN that) (S (NP (DT the) (NN film)) (VP (VBZ is) (ADVP (RB never)) (ADJP (JJ dull))))))))
(ROOT (S (-RRB- ) (VP (VB ) (SBAR (IN ) (S (NP (DT ) (NN )) (VP (VBZ ) (ADVP (RB )) (ADJP (JJ ))))))))