Complex sentence: In 1927, Leonard Woolley excavated the site and identified it as a Sumerian archaeological site where the Chaldeans were to settle around the 9th century BCE; recent archaeology work has continued to focus on the location in Nasiriyah, where the ancient Ziggurat of Ur is located.
Split into simpler sentences: In 1927, Leonard Woolley excavated the site and identified it as a Sumerian archaeological site where the Chaldeans were to settle around the 9th century BCE. Recent archaeology work has continued to focus on the location in Nasiriyah, where the ancient Ziggurat of Ur is located.