I want to know the answer to the following question:
In what year did the Polish government officially take over the administration in East Prussia?
All the background I'm provided with is that "Subsequently Polish expatriates from Polish lands annexed by the Soviet Union as well as Ukrainians and Lemkos from southern Poland, expelled in Operation Vistula in 1947, were settled in the southern part of East Prussia, now the Polish Warmian-Masurian Voivodeship.". Is that enough to answer the question?
Answer: no