that is often quite rich and exciting 
(ROOT (S (NP (DT that)) (VP (VBZ is) (ADVP (RB often)) (ADJP (RB quite) (JJ rich) (CC and) (JJ exciting)))))
(ROOT (S (NP (DT )) (VP (VBZ ) (ADVP (RB )) (ADJP (RB ) (JJ ) (CC ) (JJ )))))