Context: 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.

Question: On what date was Kaliningrad Oblast annexed?
Answer: April 17, 1946

Question: What province of Germany did Kaliningrad Oblast form a part of?
Answer: East Prussia

Question: What administrative division did Kaliningrad Oblast become a part of?
Answer: the Russian SFSR

Question: On what date was Kaliningrad Oblast trade away?
Answer: Unanswerable

Question: On what date was Kaliningrad Ozarks annexed?
Answer: Unanswerable

Question: What state of Germany did Kaliningrad Oblast form a part of?
Answer: Unanswerable

Question: What province of Germany did Kaliningrad Oblast cease to be a part of?
Answer: Unanswerable

Question: What administrative division did Kaliningrad Oblast leave?
Answer: Unanswerable