we only know as an evil , monstrous lunatic 
(ROOT (S (NP (PRP we)) (ADVP (RB only)) (VP (VBP know) (PP (IN as) (NP (DT an) (JJ evil) (, ,) (JJ monstrous) (NN lunatic))))))
(ROOT (S (NP (PRP )) (ADVP (RB )) (VP (VBP ) (PP (IN ) (NP (DT ) (JJ ) (, ) (JJ ) (NN ))))))