Question: Christian O'Brien was involved in the discovery of Chogha Zanbil; which is one of the few ziggurats outside of where?
Sentence (from "Chogha Zanbil"): Chogha Zanbil (Persian: چغازنبيل‎ ‎ ; Elamite: Dur Untash) is an ancient Elamite complex in the Khuzestan province of Iran.
Relevant evidence: No