Task: Text Categorization
Input (English): Text:  The St. Louis class light cruisers were a pair of warships that served in the US Navy during World War II. The class was a slight modification of the seven-ship Brooklyn class that immediately preceded them incorporating new higher pressure boilers and a new boiler arrangement with machinery on the unit system: alternating boiler and engine rooms to prevent a ship from being immobilized by a single unlucky hit. Additionally AA armament was improved.
Output (English): 6