(IP (NP-SBJ (-NONE- *PRO*)) (VP (VV 防止) (NP-OBJ (NN 鸟类)) (IP (NP-SBJ (-NONE- *PRO*)) (VP (VV 啄食) (NP-OBJ (NN 果肉))))))
ARG0: *PRO* ARG1: 果肉 REL: 啄食