have a tendency to slip into hokum 
(ROOT (S (VP (VB have) (NP (DT a) (NN tendency) (S (VP (TO to) (VP (VB slip) (PP (IN into) (NP (NN hokum))))))))))
(ROOT (S (VP (VB ) (NP (DT ) (NN ) (S (VP (TO ) (VP (VB ) (PP (IN ) (NP (NN ))))))))))