( (IP (NP-SBJ (-NONE- *pro*))
(VP (ADVP (AD 所以))
(VP (VV 说)
(IP-OBJ (IP (CP-SBJ (IP (IP-ADV (NP-SBJ (-NONE- *pro*))
(VP (VRD (VV 分析)
(VV 起来))))
(DFL (VV 到))
(PU ，)
(IP-SBJ (IP (ADVP (AD 到底))
(FLR (PN 这个))
(NP-SBJ (NN 人))
(VP (VV 发病)))
(CC 或者)
(IP (FLR (DT 什么))
(NP-SBJ (NN 家禽))
(VP (VV 发病))))
(PU ，)
(VP (VNV (VC 是)
(AD 不)
(VC 是))
(VP (PP-LGS (P 由)
(NP (DP (DT 这些))
(NP (NN 野鸟))))
(VP (VRD (VV 传)
(VV 过来))))))
(SP 的))
(PU ，)
(ADVP (AD 所以))
(ADVP (AD 也))
(ADVP (ADVP (AD 很))
(ADVP (AD 难)))
(VP (VV 分析)))
(PU ，)
(IP (NP-SBJ (-NONE- *pro*))
(VP (ADVP (AD 也))
(VP (VE 没有)
(NP-OBJ (DP (DT 这些))
(ADJP (JJ 第一手))
(NP (NN 资料)))))))))
(PU 。)))
ARGM-ADV: 到底
ARG0: 人
REL: 发病