only a document of the worst possibilities of mankind can be 
(ROOT (S (NP (NP (RB only) (DT a) (NN document)) (PP (IN of) (NP (NP (DT the) (JJS worst) (NNS possibilities)) (PP (IN of) (NP (NN mankind)))))) (VP (MD can) (VP (VB be)))))
(ROOT (S (NP (NP (RB ) (DT ) (NN )) (PP (IN ) (NP (NP (DT ) (JJS ) (NNS )) (PP (IN ) (NP (NN )))))) (VP (MD ) (VP (VB )))))