Assertion: parchment | /r/ObjectUse | used by ancient greeks
Facets:
Source sentences:
text: The sheet could have been made of papyrus (made by the Egyptians, by weaving the inner stems of the papyrus plant and then hammering them together), or parchment or vellum (very thin animal skin, first used by the ancient Greeks), or paper (made from plant fibers, invented by the Chinese).