Task: Text Categorization
Input (English): Context: The Kızılırmak (Turkish for Red River) also known as the Halys River (Ancient Greek: Ἅλυς) is the longest river in Turkey among the rivers which originates and ends in Turkey (both origin and mouth being in Turkey). It is a source of hydroelectric power and is not used for navigation.
Question: The document can be classified to which topic? 
Options: 1)NaturalPlace, 2)Film, 3)EducationalInstitution, 4)Plant, 5)Animal
Output (English): 1