About: http://webisa.webdatacommons.org/61663375

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The Calumet and Hecla Mining Company was a major copper-mining company based in the Michigan Copper Country.
http://www.w3.org/ns/prov#wasQuotedFrom	wikipedia.org