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 )))))