once the true impact of the day unfolds , the power of this movie is undeniable . 
(ROOT (S (SBAR (IN once) (S (NP (NP (DT the) (JJ true) (NN impact)) (PP (IN of) (NP (DT the) (NN day)))) (VP (VBZ unfolds)))) (, ,) (NP (NP (DT the) (NN power)) (PP (IN of) (NP (DT this) (NN movie)))) (VP (VBZ is) (ADJP (JJ undeniable))) (. .)))
(ROOT (S (SBAR (IN ) (S (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (DT ) (NN )))) (VP (VBZ )))) (, ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (NN )))) (VP (VBZ ) (ADJP (JJ ))) (. )))