struggles of the working class to life 
(ROOT (NP (NP (NNS struggles)) (PP (IN of) (NP (DT the) (NN working) (NN class))) (PP (TO to) (NP (VB life)))))
(ROOT (NP (NP (NNS )) (PP (IN ) (NP (DT ) (NN ) (NN ))) (PP (TO ) (NP (VB )))))