(IP (ADVP (AD 但))
(NP-SBJ (-NONE- *pro*))
(VP (ADVP-WH (AD 如何))
(PP-TMP (P 在)
(NP (IP-APP (NP-SBJ (-NONE- *PRO*))
(VP (VV 除)
(NP-OBJ (NN 污))))
(NP (NN 同时))))
(ADVP (AD 不))
(VP (VV 伤害)
(NP-OBJ (CP (WHNP-1 (-NONE- *OP*))
(CP (IP (NP-SBJ (-NONE- *T*-1))
(VP (VCD (VA 复杂)
(VA 多样))))
(DEG 的)))
(NP (NN 珊瑚礁)
(NN 生态))))))
ARG0: *PRO*
ARG1: 污
REL: 除
ARG0:
ARG1:
REL: 除