Task: Text Categorization
Input (English): Context: Lake Pancharevo (Панчаревско езеро Pancharevsko ezero or Язовир Панчарево Pancharevo Reservoir) is an artificial lake in western Bulgaria at the end of the Pancharevo Gorge of the Iskar River located at 600 m above sea level between the Vitosha and Lozenska mountains. It is 3 km long and up to 700 m wide reaching a depth of 30 m and is situated 12 km southeast of the capital city of Sofia where the Vitoshka Bistritsa flows into the Iskar.
Question: The document can be classified to which topic? 
Options: 1)NaturalPlace, 2)OfficeHolder, 3)Animal, 4)Village
Output (English): 1