Task: Text Categorization
Input (English): Text:  USRC Walter Forward (1841) was a schooner constructed for service with the United States Revenue Marine. She served with the U.S.Navy in Mexican waters during the Mexican-American War and was after the war was temporarily transferred to the U.S. Coast Survey as USC&GS Walter Forward before being returned to the U.S. Revenue Marine for service during the American Civil War.
Output (English): 6