a bit of a cheat in the end 
(ROOT (S (NP (NP (DT a) (NN bit)) (PP (IN of) (NP (DT a) (NN cheat)))) (PP (IN in) (NP (DT the) (NN end)))))
(ROOT (S (NP (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (NN )))) (PP (IN ) (NP (DT ) (NN )))))