it challenges , this nervy oddity , like modern art should . 
(ROOT (S (NP (PRP it)) (VP (VBZ challenges) (, ,) (NP (DT this) (JJ nervy) (NN oddity)) (, ,) (SBAR (IN like) (S (NP (JJ modern) (NN art)) (VP (MD should))))) (. .)))
(ROOT (S (NP (PRP )) (VP (VBZ ) (, ) (NP (DT ) (JJ ) (NN )) (, ) (SBAR (IN ) (S (NP (JJ ) (NN )) (VP (MD ))))) (. )))