(PP-LOC (P 在)
(NP (CP (WHPP-1 (-NONE- *OP*))
(IP (NP-SBJ (NP-PN (NR 三峡))
(NP (NN 工程)))
(VP (PP-TMP (-NONE- *T*-1))
(NP-LOC (ADJP (JJ 大))
(NP (NN 江)))
(VP (VV 截流)))))
(NP (NN 前夕))))
ARG0: 三峡 工程
ARG1: 大 江
ARGM-TMP: *T*-1
REL: 截流