that came to define a generation 
(ROOT (SBAR (WHNP (DT that)) (S (VP (VBD came) (S (VP (TO to) (VP (VB define) (NP (DT a) (NN generation)))))))))
(ROOT (SBAR (WHNP (DT )) (S (VP (VBD ) (S (VP (TO ) (VP (VB ) (NP (DT ) (NN )))))))))