 Complete the following phrase:  To control the population, prominent citizens and intellectuals, particularly Jews and Poles, were either confined in ghettos or transported to execution sites such as the Gestapo prison on Pełczyńska Street, the Brygidki Prison, the former military prison at Zamarstynów and to the fields surrounding the city  in the suburb of Winniki, the Kortumówka hills and the Jewish Cemetery. Many of those killed were prominent leaders of Polish society: politicians, artists, aristocrats, sportsmen, scientists, priests, rabbis and other members of the intelligentsia. This mass murder is regarded as a pre-emptive measure to keep the Polish resistance scattered and to prevent Poles from revolting against Nazi rule. It was a direct continuation of the infamous 