Q: 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 Crewe and Nantwich by-election, 2008 was a parliamentary by-election held on 22 May 2008, for the British House of Commons constituency of Crewe and Nantwich, in Cheshire, England.
Answer : 22 May 2008
A:
The point in time of Crewe and Nantwich by-election, 2008 was when?