Assertion: titanium | /r/HasProperty | discovered in magnetic ferriferous sands
Facets:
value: near the parish of manaccan
type: LOCATION
value: in england
type: LOCATION
Source sentences:
text: Titanium in dioxide form was discovered in 1791 by the British amateur mineralogist W. Gregor in the magnetic ferriferous sands near the parish of Manaccan, in England.