You will be given a definition of a task first, then some input of the task.
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.

Context : The Bukken Bruse disaster was the crash of a flying boat during its landing on 2 October 1948.
Answer : 2 October 1948
Output:
When did Bukken Bruse disaster occurr?