down on their working-class subjects 
(ROOT (PP (RP down) (PP (IN on) (NP (PRP$ their) (NML (NN working) (HYPH -) (NN class)) (NNS subjects)))))
(ROOT (PP (RP ) (PP (IN ) (NP (PRP$ ) (NML (NN ) (HYPH ) (NN )) (NNS )))))