( (IP (IP (ADVP (AD 但)) (NP-SBJ (-NONE- *pro*)) (VP (PP-TMP (P 在) (LCP (IP (NP-SBJ (-NONE- *pro*)) (VP (VV 提出) (NP-OBJ (NN 对策)))) (LC 时))) (VP (VP-FOC (VV 用词)) (VP (VA 谨慎))))) (PU ,) (IP (NP-SBJ (DNP (NP (NN 关键)) (DEG 之)) (NP (NN 处))) (VP (VV 显得) (IP-OBJ (NP-SBJ (-NONE- *PRO*)) (VP (VV 模棱两可))))) (PU 。)))
ARG0: *PRO*
REL: 模棱两可