(IP (ADVP (AD 而))
(NP-SBJ (CP (WHNP-1 (-NONE- *OP*))
(CP (IP (NP-SBJ (-NONE- *T*-1))
(VP (ADVP (AD 最))
(VP (VA 上等))))
(DEC 的)))
(NP (PU 「)
(NN 浴缸)
(PU 」)))
(VP (ADVP (AD 自然))
(VP (VC 是)
(NP-PRD (NN 桧木)
(NN 桶)))))
ARG0: *T*-1
ARGM-ADV: 最
REL: 上等