Complex sentence: Later he was a coach for the German second division club SpVgg Fürth and Borussia Neunkirchen, which he led from second divison into the Bundesliga, however he had to face relegation after one season.
Split into simpler sentences: Later he was a coach for the German second division clubs SpVgg Fürth and Borussia Neunkirchen. He led Borussia into the Bundesliga, however he had to face relegation after one season.