 
 <prompt> Wetin be di state wey start with P? Based on di previous question, write small tori wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: Representatives of di Polish goment officially take over di civilian administration of di southern part of East Prussia on 23 May 1945. Subsequently Polish expatriates from Polish lands annexed by di Soviet Union as well as Ukrainians and Lemkos from southern Poland, wey dem expel for Operation Vistula for 1947, dey settle for di southern part of East Prussia, wey be di Polish Warmian-Masurian Voivodeship. For 1950 di Olsztyn Voivodeship count 689,000 pipo, 22.6% of dem come from areas annexed by di Soviet Union, 10% Ukrainians, and 18.5% of dem na pre-war inhabitants. Di remaining pre-war population na Germanized Poles and dem pursue policy of re-Polonization throughout di country. Most of these "Autochthones" choose to emigrate go West Germany from di 1950s through 1970s (between 1970 and 1988 55,227 pipo from Warmia and Masuria move go Western Germany). Local toponyms dem Polonised by di Polish Commission for di Determination of Place Names. 