Complex sentence: Fritz Stein conducted the Akademischer Chor Jena and the "Sängerschaft zu St.Pauli", the band of the Erfurt Infantry Regiment 71, members of the Weimar court orchestra (Weimarer Hofkapelle) and organist Kurt Gorn.
Split into simpler sentences: Fritz Stein conducted the Akademischer Chor Jena and the "Sängerschaft zu St.Pauli", the band of the 71. Infanterieregiment Erfurt and members of the Weimar court orchestra (Weimarer Hofkapelle), and organist Kurt Gorn.