we have absolutely no idea who the main characters are until the film is well under way -- and yet it 's hard to stop watching . 
(ROOT (S (S (NP (PRP we)) (VP (VBP have) (NP (RB absolutely) (DT no) (NN idea) (SBAR (WHNP (WP who)) (S (NP (DT the) (JJ main) (NNS characters)) (VP (VBP are))))) (SBAR (IN until) (S (NP (DT the) (NN film)) (VP (VBZ is) (PP (ADVP (RB well)) (IN under) (NP (NN way)))))))) (, --) (CC and) (S (ADVP (CC yet)) (NP (NP (PRP it))) (VP (VBZ 's) (ADJP (JJ hard)) (S (VP (TO to) (VP (VB stop) (S (VP (VBG watching)))))))) (. .)))
(ROOT (S (S (NP (PRP )) (VP (VBP ) (NP (RB ) (DT ) (NN ) (SBAR (WHNP (WP )) (S (NP (DT ) (JJ ) (NNS )) (VP (VBP ))))) (SBAR (IN ) (S (NP (DT ) (NN )) (VP (VBZ ) (PP (ADVP (RB )) (IN ) (NP (NN )))))))) (, ) (CC ) (S (ADVP (CC )) (NP (NP (PRP ))) (VP (VBZ ) (ADJP (JJ )) (S (VP (TO ) (VP (VB ) (S (VP (VBG )))))))) (. )))