it does n't work as either . 
(ROOT (S (NP (PRP it)) (VP (VBZ does) (RB n't) (VP (VB work) (PP (IN as) (ADVP (RB either))))) (. .)))
(ROOT (S (NP (PRP )) (VP (VBZ ) (RB ) (VP (VB ) (PP (IN ) (ADVP (RB ))))) (. )))