(IP (NP-SBJ (NN 死因))
(VP (VC 是)
(NP-PRD (CP (WHNP-1 (-NONE- *OP*))
(CP (IP (NP-TPC (NN 早产儿))
(NP-SBJ (-NONE- *T*-1))
(VP (ADVP (AD 最))
(VP (VA 致命))))
(DEC 的)))
(NP (NN 肺出血)))))
ARG0-PSE: *T*-1
ARGM-TPC: 早产儿
ARGM-ADV: 最
REL: 致命