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In page Lviv:

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According to the Third Reich's racial policies, local Jews then became the main target of German repressions in the region. Following the German occupation, the Jewish population was concentrated in the Lwów Ghetto established in the city's Zamarstynów (today Zamarstyniv) district and the Janowska concentration camp was also set up. In the Janowska concentration camp, the Nazis conducted torture and executions to music. The Lviv National Opera members, who were prisoners, played one and the same tune, Tango of Death.[citation needed]