Assertion: kaleidoscope | /r/HasProperty | invented by sir david brewster
Facets:
value: about 1816
type: TEMPORAL
Source sentences:
text: The kaleidoscope was invented by Sir David Brewster about 1816 and patented in 1817.
text: Invented by Sir David Brewster, and patented by him in 1817, kaleidoscopes have since taken many forms.