a substantial arc of change that does n't produce any real transformation 
(ROOT (NP (NP (NP (DT a) (JJ substantial) (NN arc)) (PP (IN of) (NP (NN change)))) (SBAR (WHNP (WDT that)) (S (VP (VBZ does) (RB n't) (VP (VB produce) (NP (DT any) (JJ real) (NN transformation))))))))
(ROOT (NP (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (NN )))) (SBAR (WHNP (WDT )) (S (VP (VBZ ) (RB ) (VP (VB ) (NP (DT ) (JJ ) (NN ))))))))