what 's most offensive is n't the waste of a good cast 
(ROOT (S (SBAR (WHNP (WP what)) (S (VP (VBZ 's) (ADJP (RBS most) (JJ offensive))))) (VP (VBZ is) (RB n't) (NP (NP (DT the) (NN waste)) (PP (IN of) (NP (DT a) (JJ good) (NN cast)))))))
(ROOT (S (SBAR (WHNP (WP )) (S (VP (VBZ ) (ADJP (RBS ) (JJ ))))) (VP (VBZ ) (RB ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (JJ ) (NN )))))))