Assertion: black ink | /r/ObjectUse | used in the middle ages
Facets:
value: traditionally
type: OTHER
value: for writing
type: PURPOSE
value: for the simple reason
type: CAUSE
Source sentences:
text: Black ink, invented in China, was traditionally used in the Middle Ages for writing, for the simple reason that black was the darkest color and therefore provided the greatest contrast with white paper or parchment, making it the easiest color to read.