ensures the film never feels draggy . 
(ROOT (S (VP (VBZ ensures) (SBAR (S (NP (DT the) (NN film)) (ADVP (RB never)) (VP (VBZ feels) (S (ADJP (JJ draggy))))))) (. .)))
(ROOT (S (VP (VBZ ) (SBAR (S (NP (DT ) (NN )) (ADVP (RB )) (VP (VBZ ) (S (ADJP (JJ ))))))) (. )))