to call this film a lump of coal would only be to flatter it . 
(ROOT (S (S (VP (TO to) (VP (VB call) (NP (DT this) (NN film)) (S (NP (NP (DT a) (NN lump)) (PP (IN of) (NP (NN coal)))))))) (VP (MD would) (ADVP (RB only)) (VP (VB be) (S (VP (TO to) (VP (VB flatter) (NP (PRP it))))))) (. .)))
(ROOT (S (S (VP (TO ) (VP (VB ) (NP (DT ) (NN )) (S (NP (NP (DT ) (NN )) (PP (IN ) (NP (NN )))))))) (VP (MD ) (ADVP (RB )) (VP (VB ) (S (VP (TO ) (VP (VB ) (NP (PRP ))))))) (. )))