Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Experimental Mine U.S. Bureau of Mines - Experimental Mine U.S. Bureau of Mines is a landmark located in the Pittsburgh suburb of Bruceton Pennsylvania. In 1910 the newly created U.S. Bureau of Mines leased a 38-acre tract of land from the Pittsburgh Coal Company and opened the Experimental Mine.One of the early findings in the Experimental Mine demonstrated that coal dust by itself was capable of propagating an explosion even in the absence of any methane gas.
Answer:
Building