Complex sentence: Gerti Deutsch was an only child, born to Jewish parents from Olomouc, Moravia (mother) and Bielsko-Biala, Eastern Silesia (father) and grew up in an apartment behind the Karlskirche in the centre of Vienna.
Split into simpler sentences: Gerti Deutsch was an only child, born to Jewish parents. She grew up in an apartment behind the Karlskirche in the centre of Vienna.