(CP (WHNP-1 (-NONE- *OP*))
(CP (IP (NP-SBJ (NN 警方))
(VP (NP-ADV (DP (DT 下))
(QP (CD 一))
(NP (NN 步)))
(VP (VV 要)
(IP-OBJ (NP-SBJ (-NONE- *PRO*))
(VP (VV 取谛)
(NP-OBJ (-NONE- *T*-1)))))))
(DEC 的)))
(NP (NN 重点)))
ARG0: *PRO*
ARG1: *T*-1 -> 重点
REL: 取谛