stuck in heaven because he 's afraid of his best-known creation ? 
(ROOT (S (VP (VBN stuck) (PP (IN in) (NP (NN heaven))) (SBAR (IN because) (S (NP (PRP he)) (VP (VBZ 's) (ADJP (JJ afraid) (PP (IN of) (NP (PRP$ his) (ADJP (RBS best) (HYPH -) (VBN known)) (NN creation)))))))) (. ?)))
(ROOT (S (VP (VBN ) (PP (IN ) (NP (NN ))) (SBAR (IN ) (S (NP (PRP )) (VP (VBZ ) (ADJP (JJ ) (PP (IN ) (NP (PRP$ ) (ADJP (RBS ) (HYPH ) (VBN )) (NN )))))))) (. )))