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"): These novel groups of archaea named ARMAN-1, ARMAN-2 ("Candidatus" Micrarchaeum acidiphilum ARMAN-2 ), and ARMAN-3 were missed by previous PCR-based surveys of the mine community because the ARMANs have several mismatches with commonly used PCR primers for 16S rRNA genes.
Relevant evidence: Yes