Task: Text Categorization
Input (English): Text:  The Northrop Grumman X-47C is designed to be a stealth unmanned aircraft. Its ancestors the X-47A and the X-47B made this unmanned aircraft possible to carry out the stealth that was needed in order to be undetectable by radar. It is planned to have a payload of 10000 pounds (4500 kg) significantly exceeding that of the X-47A.
Output (English): 6