Task: Text Categorization
Input (English): About two-thirds of the way through its course it receives the Meta River on its left and joins the Apure River. Early on it divides at La Esmeralda, and one of its arms, the Casiquiare River, flows southward. After it rises in the Parima Mountains, it follows a course resembling a reverse C and goes through the plains known as the Llanos [YA-nose] before entering the Atlantic Ocean. FTP, name this South American river that flows mostly through Venezuela.
Output (English): Social Science