by the sheer beauty of his images 
(ROOT (PP (IN by) (NP (NP (DT the) (JJ sheer) (NN beauty)) (PP (IN of) (NP (PRP$ his) (NNS images))))))
(ROOT (PP (IN ) (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (PRP$ ) (NNS ))))))