an extremely funny , ultimately heartbreaking 
(ROOT (NP (DT an) (ADJP (ADJP (RB extremely) (JJ funny)) (, ,) (ADJP (RB ultimately) (JJ heartbreaking)))))
(ROOT (NP (DT ) (ADJP (ADJP (RB ) (JJ )) (, ) (ADJP (RB ) (JJ )))))