sentences:  Because of this, the post-war Polish state administration after the annexation of Silesia in 1945 did not initiate a general expulsion of all former inhabitants of Opole, as was done in Lower Silesia, for instance, where the population almost exclusively spoke the German language.Because they were considered "autochthonous" (Polish), the Wasserpolak-speakers instead received the right to remain in their homeland after declaring themselves as Poles.Some German speakers took advantage of this decision, allowing them to remain in their Oppeln, even when they considered themselves to be of German nationality.