Original: Escopetarras were invented by Colombian peace activist César López in 2003 at a gathering after the El Nogal Club bombing in Bogotá, when he noticed a soldier holding a gun like a guitar.
Simplified: Escopetarras were invented in 2003 by a Colombian peace activist named César López. At a gathering after the El Nogal Club bombing in Bogotá, he noticed a soldier holding a gun like a guitar and got the idea for it.