is plenty of room for editing 
(ROOT (VP (VBZ is) (NP (NP (NN plenty)) (PP (IN of) (NP (NN room))) (PP (IN for) (NP (NN editing))))))
(ROOT (VP (VBZ ) (NP (NP (NN )) (PP (IN ) (NP (NN ))) (PP (IN ) (NP (NN ))))))