on top of a foundering performance , ( madonna 's ) denied her own athleticism by lighting that emphasizes every line and sag . 
(ROOT (S (PP (IN on) (NP (NP (NN top)) (PP (IN of) (NP (NP (DT a) (VBG foundering) (NN performance)) (, ,) (-LRB- -LRB-) (NP (NNP madonna) (POS 's)) (-RRB- -RRB-))))) (VP (VBD denied) (NP (PRP$ her) (JJ own) (NN athleticism)) (PP (IN by) (NP (NP (NN lighting)) (SBAR (WHNP (WDT that)) (S (VP (VBZ emphasizes) (NP (DT every) (NN line) (CC and) (NN sag)))))))) (. .)))
(ROOT (S (PP (IN ) (NP (NP (NN )) (PP (IN ) (NP (NP (DT ) (VBG ) (NN )) (, ) (-LRB- ) (NP (NNP ) (POS )) (-RRB- ))))) (VP (VBD ) (NP (PRP$ ) (JJ ) (NN )) (PP (IN ) (NP (NP (NN )) (SBAR (WHNP (WDT )) (S (VP (VBZ ) (NP (DT ) (NN ) (CC ) (NN )))))))) (. )))