Question: Which prehistoric period of Mesopotamia were the majority of the remains from found in Tell al-Ubaid?
Sentence (from "Prehistoric Indonesia"): West Java and coastal Eastern Borneo, for example, began their historical periods in the early 4th century, but megalithic culture still flourished and script was unknown in the rest of Indonesia, including in Nias, Batak, and Toraja.
Relevant evidence: No