 Complete the following phrase:  During the German occupation of Poland World War II, the Polish population was subject to mass arrests, executions, expulsions, deportations to Nazi concentration camps and confiscation of property. The Einsatzgruppe VI carried out public executions of Poles in the town on October 2 and October 23, 1939 as part of the Intelligenzaktion, killing 8 and 18 people respectively, including activists, merchants, landowners, the director of the local narrow gauge railway, the chairman of the local branch of the Sokół Polish Gymnastic Society, principals of schools from Kościan and the nearby village of Borowo and one student. In Kościan, the Germans operated a prison for Poles from both the town and the region, many of whom were later transported to the infamous 