(IP-OBJ (IP-ADV (NP-SBJ (-NONE- *PRO*))
(VP (VV 相较於)
(NP-OBJ (CP (WHNP-2 (-NONE- *OP*))
(CP (IP (NP-SBJ (-NONE- *T*-2))
(VP (VA 灵活)))
(DEC 的)))
(NP (QP (CD 四))
(NP (NN 足)))
(NP (NN 动物)))))
(PU ，)
(IP-ADV (IP (NP-SBJ (CP (WHNP-3 (-NONE- *OP*))
(CP (IP (NP-SBJ (-NONE- *T*-3))
(VP (VV 源自)
(NP-OBJ (NN 穴居)
(NN 动物))))
(DEC 的)))
(NP (NN 蛇类)))
(VP (ADVP (AD 既))
(VP (VV 乏)
(NP-OBJ (NN 四肢)))))
(PU ，)
(IP (NP-SBJ (NN 眼力)
(PU 、)
(NN 听力))
(VP (ADVP (AD 又))
(ADVP (AD 都))
(ADVP (AD 不))
(VP (VA 佳)))))
(PU ，)
(NP-SBJ (NN 毒牙))
(VP (ADVP (AD 几乎))
(VP (VC 是)
(NP-PRD (CP (WHPP-4 (-NONE- *OP*))
(CP (IP (NP-SBJ (-NONE- *pro*))
(VP (PP-MNR (-NONE- *T*-4))
(VP (VV 猎食)
(CC 与)
(VV 御敌))))
(DEC 的)))
(ADJP (JJ 唯一))
(NP (NN 工具))))))
ARG0: *pro*
ARGM-MNR: *T*-4
REL: 猎食