Complex sentence: General Count Tadeusz Komorowski (1895-1966), better known by the name Bór-Komorowski (Bór being one of his wartime code-names), Polish military leader, was born in Lwów (then officially Lemberg in the Austro-Hungarian Empire).
Split into simpler sentences: General Count Tadeusz Komorowski (1895-1966), better known by the name Bór-Komorowski (Bór being one of his wartime code-names), was a Polish military leader. Komorowski was born in Lwów (then officially Lemberg in the Austro-Hungarian Empire).