a variant of the nincompoop benigni persona 
(ROOT (NP (NP (DT a) (NN variant)) (PP (IN of) (NP (DT the) (NN nincompoop) (NN benigni) (NN persona)))))
(ROOT (NP (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (NN ) (NN ) (NN )))))