cheap , graceless , hackneyed sci-fi serials 
(ROOT (NP (JJ cheap) (, ,) (JJ graceless) (, ,) (JJ hackneyed) (NML (NN sci-) (NN fi)) (NNS serials)))
(ROOT (NP (JJ ) (, ) (JJ ) (, ) (JJ ) (NML (NN ) (NN )) (NNS )))