Complex sentence: Chernyakhovsk (German: Insterburg, Lithuanian: Įsrūtis, Polish: Wystruć) is a town in Kaliningrad Oblast, Russia, which before 1945 was known by its German name, Insterburg and was in East Prussia.
Split into simpler sentences: Chernyakhovsk (German: Insterburg, Lithuanian: Įsrūtis, Polish: Wystruć) is a town in the Kaliningrad Oblast of Russia. Until 1945 it was known by its German name of Insterburg and was in East Prussia.