who have carved their own comfortable niche in the world 
(ROOT (SBAR (WHNP (WP who)) (S (VP (VBP have) (VP (VBN carved) (NP (PRP$ their) (JJ own) (JJ comfortable) (NN niche)) (PP (IN in) (NP (DT the) (NN world))))))))
(ROOT (SBAR (WHNP (WP )) (S (VP (VBP ) (VP (VBN ) (NP (PRP$ ) (JJ ) (JJ ) (NN )) (PP (IN ) (NP (DT ) (NN ))))))))