is this films reason for being . 
(ROOT (SQ (VBZ is) (NP (NP (DT this) (NNS films) (NN reason)) (PP (IN for) (S (VP (NN being))))) (. .)))
(ROOT (SQ (VBZ ) (NP (NP (DT ) (NNS ) (NN )) (PP (IN ) (S (VP (NN ))))) (. )))