the actors must indeed be good to recite some of this laughable dialogue with a straight face . 
(ROOT (S (NP (DT the) (NNS actors)) (VP (MD must) (ADVP (RB indeed)) (VP (VB be) (ADJP (JJ good)) (S (VP (TO to) (VP (VB recite) (NP (NP (DT some)) (PP (IN of) (NP (DT this) (JJ laughable) (NN dialogue)))) (PP (IN with) (NP (DT a) (JJ straight) (NN face)))))))) (. .)))
(ROOT (S (NP (DT ) (NNS )) (VP (MD ) (ADVP (RB )) (VP (VB ) (ADJP (JJ )) (S (VP (TO ) (VP (VB ) (NP (NP (DT )) (PP (IN ) (NP (DT ) (JJ ) (NN )))) (PP (IN ) (NP (DT ) (JJ ) (NN )))))))) (. )))