(IP (NP-PN-SBJ (NR 民进党))
(VP (VP (LCP-TMP (IP (NP-SBJ (-NONE- *PRO*))
(VP (NP-TMP (NT 过去))
(VP (VV 在野))))
(LC 时))
(ADVP (AD 也))
(ADVP (AD 一再))
(VP (VV 炮轰)))
(PU ，)
(VP (IP-ADV (NP-SBJ (-NONE- *PRO*))
(VP (ADVP (AD 如今))
(VP (VV 执政))))
(ADVP (AD 自然))
(ADVP (AD 很))
(VP (VA 难)
(IP-OBJ (NP-SBJ (-NONE- *PRO*))
(VP (ADVP (AD 不))
(VP (SB 被)
(VP (VV 质疑)))))))))
ARG0: 民进党
ARGM-ADV: 一再
ARGM-ADV: 也
ARGM-TMP: *PRO* 过去 在野 时
REL: 炮轰