first film something of a sleeper success 
(ROOT (S (NP (JJ first) (NN film)) (NP (NP (NN something)) (PP (IN of) (NP (DT a) (NN sleeper) (NN success))))))
(ROOT (S (NP (JJ ) (NN )) (NP (NP (NN )) (PP (IN ) (NP (DT ) (NN ) (NN ))))))