uses the last act to reel in the audience since its poignancy hooks us completely 
(ROOT (S (VP (VBZ uses) (NP (NP (DT the) (JJ last) (NN act)) (SBAR (S (VP (TO to) (VP (VB reel) (PRT (IN in)) (NP (DT the) (NN audience))))))) (SBAR (IN since) (S (NP (PRP$ its) (NN poignancy)) (VP (VBZ hooks) (NP (PRP us)) (ADVP (RB completely))))))))
(ROOT (S (VP (VBZ ) (NP (NP (DT ) (JJ ) (NN )) (SBAR (S (VP (TO ) (VP (VB ) (PRT (IN )) (NP (DT ) (NN ))))))) (SBAR (IN ) (S (NP (PRP$ ) (NN )) (VP (VBZ ) (NP (PRP )) (ADVP (RB ))))))))