Task: Explanation
Input (English): Steven Billy Mitchell, (born 28 December 1959), usually known by the pseudonym and pen-name of Andy McNab, is an English novelist and former Special Air Service sergeant. Question: Nick Stone is the main fictional character in a series of books written by an author born in what year? Answer: 1959
Output (English): Steven Billy Mitchell, born 28 December 1959, usually known by the pseudonym and penname of Andy McNab, is an English novelist and former Special Air Service sergeant.