search of purpose or even a plot 
(ROOT (NP (NP (NP (NN search)) (PP (IN of) (NP (NN purpose)))) (CC or) (RB even) (NP (DT a) (NN plot))))
(ROOT (NP (NP (NP (NN )) (PP (IN ) (NP (NN )))) (CC ) (RB ) (NP (DT ) (NN ))))