Complex sentence: The Höfner company was founded by luthier Karl Höfner in the city of Schönbach in Germany in 1887, and soon became the largest manufacturer of string instruments in the country.
Split into simpler sentences: The Höfner company was founded by luthier Karl Höfner in the city of Schönbach in 1887, at that time the city was German. He soon became the largest manufacturer of string instruments in the country.