I was talking about the Sumerians, a Mesopotamian people who are not just extinct but were all but forgotten about for millennia - unlike the Akkadians, a later people, who are also extinct but were at least referenced in the Bible.
Or is it "are referenced", present tense? The Bible, as in any of the physical copies lying around today, currently contains a reference to the Akkadian people. But the act of referencing them took place when the Bible was written, so in the distant past, suggesting past tense.
Which one is correct, or more correct if both are used?