( (IP (NP-SBJ (-NONE- *pro*))
(VP (DVP (ADVP (AD 牢牢))
(DEV 地))
(VP (VV 夹)
(PP (P 在)
(LCP (NP (QP (CD 两)
(CLP (M 辆)))
(CP (WHNP-1 (-NONE- *OP*))
(CP (IP (NP-SBJ (-NONE- *T*-1))
(VP (VP (VP (VV 呼啸)
(AS 着))
(PU （)
(VP (VV 咩咩)
(AS 着))
(PU ？)
(PU ）))
(VP (VV 开下)
(NP-OBJ (NP-PN (NR 俄勒冈州))
(NP (NN 南部))
(DP (DT 某)
(CLP (M 处)))
(DP (DT 某个))
(DNP (ADJP (JJ 陡峭))
(DEG 的))
(NP (NN 山关))))))
(DEC 的)))
(NP (NN 拖车)))
(LC 之间)))))
(PU ，)))
ARG0: *T*-1
REL: 咩咩