Question: What were the years of operation of the mine that a novel group of acidophilic archaea found at?
Sentence (from "Archaeal Richmond Mine acidophilic nanoorganisms"): Archaeal Richmond Mine acidophilic nanoorganisms (ARMAN) were first discovered in an extremely acidic mine located in northern California (Richmond Mine at Iron Mountain) by Brett Baker in Jill Banfield's laboratory at the University of California Berkeley.
Relevant evidence: Yes