Assertion: surviving abacus | /r/ObjectUse | used in 300 b.c.
Facets:
value: by the babylonians
type: OTHER
Source sentences:
text: In fact, the oldest surviving abacus was used in 300 B.C. by the Babylonians.
text: In fact, the oldest surviving abacus was used in 300 B.C. by the Babylonians.