Complex sentence: Los Waldos were a folk group from Argentina based in Spain, formed by Waldo de los Rios, they played folk songs from Argentina with modern instruments, such as electric guitars, electric bass, drums, piano and synthesizers, sometimes accompanied by an orchestra.
Split into simpler sentences: Los Waldos were a folk group from Argentina based in Spain, formed by Waldo de los Rios. They played folk songs from Argentina with modern instruments, such as electric guitars, electric bass, drums, piano and synthesizers, sometimes accompanied by an orchestra.