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