(CP (WHNP-1 (-NONE- *OP*)) (CP (IP (NP-SBJ (-NONE- *pro*)) (VP (VP-FOC (VV 排水)) (VP (VV 用) (NP-OBJ (-NONE- *T*-1))))) (DEC 的))) (NP (NN 运河)))))
ARG0: *pro* REL: 排水