nothing but an episode of smackdown 
(ROOT (NP (NP (NN nothing)) (PP (IN but) (NP (NP (DT an) (NN episode)) (PP (IN of) (NP (NN smackdown)))))))
(ROOT (NP (NP (NN )) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (NN )))))))