is a distinct rarity , and an event 
(ROOT (VP (VP (VBZ is) (NP (DT a) (JJ distinct) (NN rarity))) (, ,) (CC and) (NP (DT an) (NN event))))
(ROOT (VP (VP (VBZ ) (NP (DT ) (JJ ) (NN ))) (, ) (CC ) (NP (DT ) (NN ))))