of its execution and skill of its cast 
(ROOT (PP (IN of) (NP (NP (PRP$ its) (NN execution)) (CC and) (NP (NP (NN skill)) (PP (IN of) (NP (PRP$ its) (NN cast)))))))
(ROOT (PP (IN ) (NP (NP (PRP$ ) (NN )) (CC ) (NP (NP (NN )) (PP (IN ) (NP (PRP$ ) (NN )))))))