 Complete the following phrase:  When the Red Army liberated Kyiv on November 6, 1943, the camp was converted into an internment camp for German POWs and operated until 1946. The camp was subsequently demolished and in the 1950s and 1960s urban development began in the area, which included an apartment complex and a park. The construction of a dam nearby also saw the ravine filled with industrial pulp. The dam collapsed in 1961, leading to a 