nothing but one relentlessly depressing situation after another for its entire running time , 
(ROOT (NP (NP (NN nothing)) (PP (IN but) (NP (NP (CD one) (ADJP (RB relentlessly) (JJ depressing)) (NN situation)) (PP (IN after) (NP (DT another))))) (PP (IN for) (NP (PRP$ its) (JJ entire) (NN running) (NN time))) (, ,)))
(ROOT (NP (NP (NN )) (PP (IN ) (NP (NP (CD ) (ADJP (RB ) (JJ )) (NN )) (PP (IN ) (NP (DT ))))) (PP (IN ) (NP (PRP$ ) (JJ ) (NN ) (NN ))) (, )))