(CP (WHNP-1 (-NONE- *OP*))
(CP (IP (NP-TPC (-NONE- *T*-1))
(NP-SBJ (-NONE- *pro*))
(VP (VV 匿藏)
(PP (P 在)
(NP (NN 背后)))))
(DEC 的)))
(NP (NN 西瓜)
(NN 刀))))
ARG0: *pro*
ARG1: *T*-1 -> 西瓜 刀
ARG2: 在 背后
REL: 匿藏