(IP (NP-SBJ (-NONE- *pro*))
(VP (ADVP (AD 怎))
(VP (VV 知)
(IP-OBJ (NP-SBJ (CP (WHNP-4 (-NONE- *OP*))
(CP (IP (NP-SBJ (LCP (NP (NN 书))
(LC 中))
(NP (NN 字字句句)))
(VP (MSP 所)
(VP (VP (VV 挥洒)
(NP-OBJ (-NONE- *RNR*-5)))
(PU 、)
(VP (VRD (VV 流泄)
(VV 出来))
(NP-OBJ-5 (-NONE- *T*-4))))))
(DEC 的))))
(PU ，)
(VP (ADVP (AD 却))
(VP (VC 是)
(NP-PRD (QP (CD 一)
(CLP (M 篇篇)))
(CP (WHNP-6 (-NONE- *OP*))
(CP (IP (NP-SBJ (-NONE- *T*-6))
(VP (VV 不堪回首)))
(DEC 的)))
(NP (NN 童年)
(NN 记忆)))))))))
ARG1: *T*-6
REL: 不堪回首