Assertion: stroller's wheel | /r/HasProperty | invented around 3,500 bc
Facets:
value: in mesopotamia
type: LOCATION
value: for some form of axle
type: PURPOSE
Source sentences:
text: Ever since the wheel was first invented around 3,500 BC in Mesopotamia as a wooden disc with a hole in the middle for some form of axle, creative Sumarian minds were buzzing.