's understanding of the expressive power of the camera . 
(ROOT (NP (NP (NP (POS 's)) (NN understanding)) (PP (IN of) (NP (NP (DT the) (JJ expressive) (NN power)) (PP (IN of) (NP (DT the) (NN camera))))) (. .)))
(ROOT (NP (NP (NP (POS )) (NN )) (PP (IN ) (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (DT ) (NN ))))) (. )))