Assertion: dye | /r/ObjectUse | used for imperial manuscripts
Facets:
value: with text in silver or gold
type: OTHER
value: on purple parchment
type: LOCATION
Source sentences:
text: The dye was used for imperial manuscripts on purple parchment, often with text in silver or gold, and porphyrogenitos or "born in the purple" was a term for Byzantine offspring of a reigning Emperor.