Question: Which prehistoric period of Mesopotamia were the majority of the remains from found in Tell al-Ubaid?
Sentence (from "Tell al-`Ubaid"): Tell al-'Ubaid (Arabic: العبيد‎ ‎ ) is a low, relatively small tell (settlement mound) west of nearby Ur in southern Iraq's Dhi Qar Governorate.
Relevant evidence: Yes