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.

Example Input: Context : Sir Thomas de Brus (c. 1284 -- 9 February 1307) was a younger brother of King Robert I of Scotland, who supported his brother in the struggle for the crown of Scotland.
Answer : 9 February 1307
Example Output: What year did Thomas de Brus die?

Example Input: Context : Mainova AG was formed in 1998 through the merger of Stadtwerke Frankfurt am Main GmbH and Maingas AG.
Answer : Stadtwerke Frankfurt
Example Output: What is Mainova's parent company?

Example Input: Context : Josef Matyas Trenkwald (13 March 1824, Prague -- 28 July 1897 Perchtoldsdorf) was a Czech/Austrian painter, best known for his religious and historical paintings.
Answer : 28 July 1897
Example Output:
When did Josef Matyas Trenkwald's death occur?