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Summary
This is a drawing of Stela 2, at the Izapa archaeological site.
Taken from Japanese Wikipedia: http://ja.wikipedia.org/wiki/%E7%94%BB%E5%83%8F:Izapa_stela2.JPG where "This image has been released into the public domain by the copyright holder, its copyright has expired, or it is ineligible for copyright. This applies worldwide."
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