is why film criticism can be considered work . 
(ROOT (S (VP (VBZ is) (SBAR (WHADVP (WRB why)) (S (NP (NN film) (NN criticism)) (VP (MD can) (VP (VB be) (VP (VBN considered) (S (NP (NN work))))))))) (. .)))
(ROOT (S (VP (VBZ ) (SBAR (WHADVP (WRB )) (S (NP (NN ) (NN )) (VP (MD ) (VP (VB ) (VP (VBN ) (S (NP (NN ))))))))) (. )))