(IP (NP-SBJ (-NONE- *pro*))
(VP (NP-TMP (NT 以前))
(ADVP (AD 总))
(VP (VV 说)
(PU ，)
(IP-OBJ (NP-SBJ (NN 中年))
(VP (VC 是)
(NP-PRD (CP (WHNP-1 (-NONE- *OP*))
(CP (IP (NP-SBJ (-NONE- *T*-1))
(VP (VV 承先启後)))
(DEC 的)))
(NP (NN 世代))))))))
ARG0: *T*-1
REL: 承先启後