 Sometimes used as a working class anthem, the hymn was widely used during the Asturian miners uprising of 1934 and during the Spanish Civil War.The lyrics (usually sung in Asturian, Spanish or a mixture between both languages) describe the painful returning home of a miner, covered in the blood of his fellow miners, who tells his wife ("Maruxina") of a mining accident in the famous Asturian mine known as "Pozu Maria Luisa" (located in Ciañu, Langreo).Coal mining, which is present in Asturias since the 18th century having a pivotal role in the historical economic activity of the region, is known as a very dangerous activity.