Three separate groups of tablets were found by the Pennsylvania team at the site. The oldest group contains seven tablets made of unbaked clay that date back to the third millennium BC. That set of tablets has not been translated because the writing is Proto-Elamite or possibly a script version of Elamite. The next set of tablets are inscribed in Sumerian and date back to 1800 BC. These tablets signify a Mesopotamian influence. The third set of tablets are the ones used by Erica Reiner to positively identify Anshan's location. An agreement was made between the researchers and the Iranian government that the Iranian government could choose ten artifacts and the remaining items would be divided between evenly between the two parties. The Iranian government chose to take several of the tablets in their choice of the original ten items.