Assertion: butte | /r/CapableOf | rival in worldwide metal production
Facets:
value: by south africa
type: LOCATION
Source sentences:
text: Copper ore mined from the Butte mining district in 1910 alone totaled 284,000,000 pounds (129,000,000 kg); at the time, Butte was the largest producer of copper in North America and rivaled in worldwide metal production only by South Africa.