(IP (NP-SBJ (-NONE- *pro*))
(VP (ADVP (AD 有时))
(ADVP (AD 更))
(VP (VV 成为)
(NP-OBJ (CP (WHNP-2 (-NONE- *OP*))
(CP (IP (NP-SBJ (NN 亲人))
(VP (NP-PRP (-NONE- *T*-2))
(VP (VV 摩擦))))
(DEC 的)))
(NP (NN 导火线))))))
ARG1: 亲人
ARGM-PRP: *T*-2
REL: 摩擦