Question: Where is the birth place of Denis Lucien Emile Feron, the former owner of Chemetco which was one of the largest United States refiners of copper from recycled or residual sources?
Sentence (from "Sierrita Mine"): The deposit had estimated reserves (in 2006) of 907 million metric tons of ore grading 0.26% copper and 0.03% molybdenum along with additional 2.4 billion tons at 0.21% copper and 0.02% molybdenum.
Relevant evidence: No