I want to know the answer to the following question:
What is obscure until the Early Dynastic III period around the 23rd century BC?
All the background I'm provided with is that "Following the Gutian period, there is a brief Sumerian Renaissance in the 21st century BC, cut short in the 20th century BC by Semitic Amorite invasions.". Is that enough to answer the question?
Answer: no