Assertion: ore's mineral | /r/HasProperty | discovered in the form of copper ore
Facets:
value: by two brothers
type: OTHER
value: by thomas bingham
type: OTHER
value: by sanford
type: OTHER
Source sentences:
text: Minerals, in the form of copper ore, were first discovered in Bingham Canyon in 1848 by two brothers, Sanford and Thomas Bingham, sons of Erastus Bingham, latter-day saint pioneers of September 1847, who grazed their cattle there.