youthful , out-to-change-the-world aggressiveness 
(ROOT (S (ADJP (JJ youthful)) (, ,) (NP (PP (IN out) (HYPH -) (S (VP (IN to) (HYPH -) (VP (NN change) (HYPH -) (NP (DT the) (HYPH -) (NN world)))))) (NN aggressiveness))))
(ROOT (S (ADJP (JJ )) (, ) (NP (PP (IN ) (HYPH ) (S (VP (IN ) (HYPH ) (VP (NN ) (HYPH ) (NP (DT ) (HYPH ) (NN )))))) (NN ))))