Complex sentence: After joining SpVgg Fürth in 1913 and winning another German championship in the following year with his new club he returned to "KFV" after the war and retired in 1923.
Split into simpler sentences: After joining SpVgg Fürth in 1913 and winning another German championship the following year, with his new club. He returned to "KFV" after the war and retired in 1923.