call it a work of art 
(ROOT (S (VP (VB call) (NP (PRP it)) (S (NP (NP (DT a) (NN work)) (PP (IN of) (NP (NN art))))))))
(ROOT (S (VP (VB ) (NP (PRP )) (S (NP (NP (DT ) (NN )) (PP (IN ) (NP (NN ))))))))