the self-destructiveness of many young people 
(ROOT (NP (NP (DT the) (NN self) (HYPH -) (NN destructiveness)) (PP (IN of) (NP (JJ many) (JJ young) (NNS people)))))
(ROOT (NP (NP (DT ) (NN ) (HYPH ) (NN )) (PP (IN ) (NP (JJ ) (JJ ) (NNS )))))