(IP (NP-TPC-3 (CP (WHNP-2 (-NONE- *OP*))
(CP (IP (NP-SBJ (-NONE- *T*-2))
(VP (VA 昂贵)))
(DEC 的)))
(NP (NN 干扰素)))
(NP-SBJ (QP (CD 大多数))
(NP (NN 患者)))
(VP (ADVP (AD 难以))
(VP (VV 承受)
(NP-OBJ (-NONE- *T*-3)))))
ARG0: 大多数 患者
ARG1: *T*-3
ARGM-ADV: 难以
REL: 承受