Premise: Lensk (Russian: Ленск ; ] ; Yakut: Лиэнскэй , "Lienskey") is a town and the administrative center of Lensky District of the Sakha Republic, Russia, located on the left bank of the Lena River, approximately 840 km west of Yakutsk, the capital of the republic. As of the 2010 Census, its population was 24,966.
Hypothesis: 24,966 people moved away from Lensk