(IP (NP-SBJ (CP-APP (IP (NP-SBJ (QP (CD 两))
(NP (NN 性)))
(VP (ADVP (AD 互相))
(VP (VP (VV 观赏))
(VP (VV 窥伺)
(NP-OBJ (NN 外表))))))
(DEC 的))
(NP (NN 游戏)))
(VP (ADVP (AD 因此))
(VP (VA 多)
(AS 了)
(NP-OBJ (QP (CD 许多))
(CP (WHNP-2 (-NONE- *OP*))
(CP (IP (NP-SBJ (-NONE- *T*-2))
(VP (VA 有趣)))
(DEC 的)))
(NP (NN 可能))))))
ARG0: 两 性
ARG1: 外表
ARGM-ADV: 互相
REL: 窥伺