nurtures the multi-layers of its characters , 
(ROOT (S (VP (VBZ nurtures) (NP (NP (DT the) (NNS multi-layers)) (PP (IN of) (NP (PRP$ its) (NNS characters))))) (, ,)))
(ROOT (S (VP (VBZ ) (NP (NP (DT ) (NNS )) (PP (IN ) (NP (PRP$ ) (NNS ))))) (, )))