generate questions: On April 17, 1946, the Kaliningrad Oblast — the northern portion of the former German province of East Prussia—was annexed by the Soviet Union and made part of the Russian SFSR.
On what date was Kaliningrad Oblast annexed? {sep_token} What province of Germany did Kaliningrad Oblast form a part of? {sep_token} What administrative division did Kaliningrad Oblast become a part of? {sep_token}