You will be given a definition of a task first, then some input of the task.
In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

Passage: A part of Belarus under Russian rule emerged as the Byelorussian Soviet Socialist Republic (Byelorussian SSR) in 1919. Soon thereafter it merged to form the Lithuanian-Byelorussian SSR. The contested lands were divided between Poland and the Soviet Union after the war ended in 1921, and the Byelorussian SSR became a founding member of the Union of Soviet Socialist Republics in 1922. The western part of modern Belarus remained part of Poland.In the 1920s and 1930s, Soviet agricultural and economic policies, including collectivization and five-year plans for the national economy, led to famine and political repression.
In 1939, Nazi Germany and the Soviet Union invaded and occupied Poland, marking the beginning of World War II. The Soviets invaded and annexed much of eastern Poland, which had been part of the country since the Peace of Riga two decades earlier. Much of the northern section of this area was added to the Byelorussian SSR, and now constitutes West Belarus. The Soviet-controlled Byelorussian People's Council officially took control of the territories, whose populations consisted of a mixture of Poles, Ukrainians, Belarusians and Jews, on 28 October 1939 in Białystok. Nazi Germany invaded the Soviet Union in 1941. The Brest Fortress, which had been annexed in 1939, at this time was subjected to one of the most destructive onslaughts that happened during the war. Statistically, the Byelorussian SSR was the hardest-hit Soviet republic in World War II; it remained in Nazi hands until 1944. During that time, Germany destroyed 209 out of 290 cities in the republic, 85% of the republic's industry, and more than one million buildings. The Nazi Generalplan Ost called for the extermination, expulsion or enslavement of most or all Belarusians for the purpose of providing more living space in the East for Germans.Casualties were estimated to be between 2 and 3 million (about a quarter to one-third of the total population), while the Jewish population of Belarus was devastated during the Holocaust and never recovered. The population of Belarus did not regain its pre-war level until 1971. It was also after this conflict that the final borders of Belarus were set by Stalin when parts of Belarusian territory were given to the recently annexed Lithuania.
Output:
How many cities of the country that was a founding member of the Union of Soviet Socialist Republics were destroyed in World War II?