Complex sentence: Lamarr was born Hedwig Eva Maria Kiesler in Vienna, Austria-Hungary, the only child of Gertrud "Trude" Kiesler (née Lichtwitz; 3 February 1894--27 February 1977) and Emil Kiesler (27 December 1880--14 February 1935).
Split into simpler sentences: Lamarr was born Hedwig Eva Maria Kiesler in Vienna, Austria-Hungary. She was the only child of Gertrud "Trude" Kiesler (née Lichtwitz; 3 February 1894--27 February 1977) and Emil Kiesler (27 December 1880--14 February 1935).