having a nightmare about bad cinema 
(ROOT (S (VP (VBG having) (NP (NP (DT a) (NN nightmare)) (PP (IN about) (NP (JJ bad) (NN cinema)))))))
(ROOT (S (VP (VBG ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (JJ ) (NN )))))))