Task: Text Categorization
Input (English): Bolshiye Koty is a town located on the western shore of this lake, and the largest bay in it is the Barguizin Bay. The mountain region Dauria lies to the east of this lake, whose Proval Bay was created by an 1862 earthquake at a river delta. The islands of Ushkani and Olkhon are located in this lake, and the Selenga and Barguzin rivers drain into it. Its sole outlet is the Angara River, and it is located in the republic of Buryatia and the province of Irkutsk. For 10 points, name this Russian lake, the oldest and the deepest in the world.
Output (English): Social Science