Assertion: writing | /r/HasProperty | invented by sumerian
Facets:
value: around 3200
type: TEMPORAL
value: in mesopotamia
type: LOCATION
Source sentences:
text: With this invention the Chinese approached the form of writing invented by the Sumerians.
text: Writing is relatively recent, however; it was first invented by the Sumerians, in Mesopotamia, around 3200 B.C.