partly a shallow rumination on the emptiness of success -- 
(ROOT (NP (ADVP (RB partly)) (NP (NP (DT a) (JJ shallow) (NN rumination)) (PP (IN on) (NP (NP (DT the) (NN emptiness)) (PP (IN of) (NP (NN success)))))) (: --)))
(ROOT (NP (ADVP (RB )) (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (NN )))))) (: )))