(IP-OBJ (NP-SBJ (DNP (NP (QP (CD 四十七)
(CLP (M 封)))
(NP (NN 信函)))
(DEG 的))
(NP (NN 索赔)
(NN 理由)))
(VP (VC 是)
(NP-PRD (CP (WHNP-1 (-NONE- *OP*))
(CP (IP (NP-SBJ (-NONE- *T*-1))
(VP (VV 站得住脚)))
(DEC 的))))))
ARG0: *T*-1
REL: 站得住脚