the funniest american comedy since graffiti bridge 
(ROOT (NP (NP (DT the) (JJS funniest) (JJ american) (NN comedy)) (PP (IN since) (NP (NN graffiti) (NN bridge)))))
(ROOT (NP (NP (DT ) (JJS ) (JJ ) (NN )) (PP (IN ) (NP (NN ) (NN )))))