is more likely to induce sleep than fright 
(ROOT (VP (VBZ is) (ADJP (ADJP (RBR more) (JJ likely) (S (VP (TO to) (VP (VB induce) (NP (NN sleep)))))) (PP (IN than) (NP (NN fright))))))
(ROOT (VP (VBZ ) (ADJP (ADJP (RBR ) (JJ ) (S (VP (TO ) (VP (VB ) (NP (NN )))))) (PP (IN ) (NP (NN ))))))