You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

This list contains the top 25 accounts with the most followers on the social photo-sharing platform Instagram. As of May 2018, the most followed user is Instagram's own account, with over 235 million followers. Selena Gomez is the most followed individual, with over 137 million followers. Ten accounts have exceeded 100 million followers on the site.
Solution: who has the maximum number of followers on instagram
Why? The answer is talking about the Instagram accounts that have the most followers. The question asking about the maximum number of followers. So this is a good example.

New input: Ash Wednesday derives its name from the placing of repentance ashes on the foreheads of participants to either the words 'Repent, and believe in the Gospel' or the dictum 'Remember that you are dust, and to dust you shall return.' The ashes may be prepared by burning palm leaves from the previous year's Palm Sunday celebrations.
Solution:
where did they get the ashes for ash wednesday