Assertion: aquatint | /r/HasProperty | invented by french artist
Facets:
value: to obtain pictorial halftones
type: PURPOSE
value: around 1760
type: TEMPORAL
Source sentences:
text: Aquatint was invented by the French artist Jean-Baptiste Le Prince around 1760 to obtain pictorial halftones so as to be able to apply them to etchings of the reproductions of the paintings.