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 Banjarmasin riot of May 1997 took place on 23 May 1997 on the last day of the election campaign for the Indonesian legislative election, 1997.
Answer : 23 May 1997
Output:
On what date did Banjarmasin riot of May 1997 take place?