( (IP (NP-SBJ (-NONE- *pro*))
(VP (NP-PRD (CP (WHNP-2 (-NONE- *OP*))
(CP (IP (NP-SBJ (-NONE- *pro*))
(VP (LCP-TMP (IP (NP-SBJ (-NONE- *pro*))
(VP (VP (VRD (VV 开发)
(VV 出))
(AS 了)
(NP-OBJ (CP (WHNP-1 (-NONE- *OP*))
(CP (IP (NP-SBJ (-NONE- *T*-1))
(VP (VA 平价)))
(DEC 的)))
(ADJP (JJ 公共))
(NP (NN 交通))))
(VP (MSP 来)
(VP (VV 缓解)))))
(LC 之前))
(ADVP (AD 常))
(VP (VV 见)
(NP-OBJ (-NONE- *T*-2)))))
(DEC 的)))
(NP (NP (ADVP (JJ 过度))
(NP (NN 拥挤)))
(CC 和)
(PU ＋)
(NP (NN 污染)))))
(PU 。)))
ARG0: *T*-1
REL: 平价