Question: The Belle Ayr mine is a coal mine located 18 miles southeast of Gillette, Wyoming currently owned and operated by Alpha Natural Resources, a large American producer of metallurgical coal for the industrial production of steel and iron and low-sulfur thermal coal to fuel steam boilers for the production of what type of power?
Sentence (from "Foundation Coal"): With corporate offices in Linthicum Heights, Maryland, the former Foundation Coal operates coal mines in Pennsylvania, West Virginia and Wyoming, and was, prior to its merger with Alpha Natural Resources, the fourth-largest American coal producer by tonnage.
Relevant evidence: No