often shocking but ultimately worthwhile exploration 
(ROOT (NP (ADJP (ADJP (RB often) (JJ shocking)) (CC but) (ADJP (RB ultimately) (JJ worthwhile))) (NN exploration)))
(ROOT (NP (ADJP (ADJP (RB ) (JJ )) (CC ) (ADJP (RB ) (JJ ))) (NN )))