to be that rarity among sequels 
(ROOT (S (VP (TO to) (VP (VB be) (NP (DT that) (NN rarity)) (PP (IN among) (NP (NNS sequels)))))))
(ROOT (S (VP (TO ) (VP (VB ) (NP (DT ) (NN )) (PP (IN ) (NP (NNS )))))))