an irresistibly uncanny ambience that goes a long way toward keeping the picture compelling 
(ROOT (NP (NP (DT an) (ADJP (RB irresistibly) (JJ uncanny)) (NN ambience)) (SBAR (WHNP (WDT that)) (S (VP (VBZ goes) (NP (NP (DT a) (JJ long) (NN way)) (PP (IN toward) (S (VP (VBG keeping) (NP (DT the) (NN picture)) (S (ADJP (JJ compelling))))))))))))
(ROOT (NP (NP (DT ) (ADJP (RB ) (JJ )) (NN )) (SBAR (WHNP (WDT )) (S (VP (VBZ ) (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (S (VP (VBG ) (NP (DT ) (NN )) (S (ADJP (JJ ))))))))))))