 Complete the following phrase:  Before World War II, the population of Białystok with over 91,000 inhabitants according to 1931 census was 43 percent Jewish. There were two Jewish cinemas in the city, several Jewish dailies, sports clubs, prominent political parties and a Jewish library with over 10,000 books. Cultural life was booming. Białystok was overrun by the Wehrmacht on September 15, 1939, during the German invasion of Poland, and one week later handed over to the Red Army attacking from the East, in accordance with the 