Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.

Input: Consider Input: Context : The naval Battle off Ulsan (Japanese: 蔚山沖海戦 Urusan'oki kaisen; Russian: Бой в Корейском проливе, Boi v Koreiskom prolive), also known as the Battle of the Japanese Sea or Battle of the Korean Strait, took place on 14 August 1904 between cruiser squadrons of the Imperial Russian Navy and the Imperial Japanese Navy during the Russo-Japanese War, four days after the Battle of the Yellow Sea. 
Answer : 14 August 1904

Output: What is the date when Battle off Ulsan happened?


Input: Consider Input: Context : Sir Henry Dymoke, 1st Baronet (1801 -- 28 April 1865), was a British landowner and the hereditary King's Champion. 
Answer : 28 April 1865

Output: The death of Henry Dymoke occured on what date?


Input: Consider Input: Context : The Desert Patrol Vehicle (DPV), formerly called the Fast Attack Vehicle (FAV), is a high-speed, lightly armored sandrail-like vehicle first used in combat during the Gulf War in 1991. 
Answer : 1991


Output: Which was the official year for the approval of Desert Patrol Vehicle?