(IP (NP-SBJ (-NONE- *pro*))
(VP (IP-ADV (NP-SBJ (-NONE- *PRO*))
(VP (ADVP (CS 虽然))
(VP (VA 安全))))
(PU ，)
(ADVP (AD 但是))
(VP (VE 没有)
(NP-OBJ (CP (WHNP-1 (-NONE- *OP*))
(CP (IP (NP-SBJ (NN 史前陶))
(VP (PP-PRP (P 因)
(IP (IP (NP-SBJ (-NONE- *PRO*))
(VP (NP-LOC (NN 户外))
(VP (VV 坑烧))))
(PU 、)
(IP (NP-SBJ (-NONE- *PRO*))
(VP (VP-FOC (VV 受热))
(VP (ADVP (AD 不))
(VP (VA 均)))))))
(VP (MSP 而)
(VP (VV 产生)
(NP-OBJ (-NONE- *T*-1))))))
(DEC 的)))
(NP (NN 烙痕))))))
ARG1: *PRO*
ARGM-LOC: 户外
REL: 坑烧