piecing the story together frustrating difficult 
(ROOT (S (S (VP (VBG piecing) (NP (DT the) (NN story)) (ADVP (RB together)))) (ADJP (JJ frustrating) (JJ difficult))))
(ROOT (S (S (VP (VBG ) (NP (DT ) (NN )) (ADVP (RB )))) (ADJP (JJ ) (JJ ))))