old enough to have developed some taste 
(ROOT (ADJP (JJ old) (RB enough) (S (VP (TO to) (VP (VB have) (VP (VBN developed) (NP (DT some) (NN taste))))))))
(ROOT (ADJP (JJ ) (RB ) (S (VP (TO ) (VP (VB ) (VP (VBN ) (NP (DT ) (NN ))))))))