, who approaches his difficult , endless work with remarkable serenity and discipline . 
(ROOT (FRAG (, ,) (SBAR (WHNP (WP who)) (S (VP (VBZ approaches) (NP (PRP$ his) (JJ difficult) (, ,) (JJ endless) (NN work)) (PP (IN with) (NP (JJ remarkable) (NN serenity) (CC and) (NN discipline)))))) (. .)))
(ROOT (FRAG (, ) (SBAR (WHNP (WP )) (S (VP (VBZ ) (NP (PRP$ ) (JJ ) (, ) (JJ ) (NN )) (PP (IN ) (NP (JJ ) (NN ) (CC ) (NN )))))) (. )))