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.

Let me give you an example: 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.
The answer to this example can be: who has the maximum number of followers on instagram
Here is 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.

OK. solve this:
In The Oxford Companion to Music, Percy Scholes points out the similarities to an early plainsong melody, although the rhythm is very distinctly that of a galliard, and he gives examples of several such dance tunes that bear a striking resemblance to 'God Save the King / Queen'. Scholes quotes a keyboard piece by John Bull (1619) which has some similarities to the modern tune, depending on the placing of accidentals which at that time were unwritten in certain cases and left to the discretion of the player (see musica ficta). He also points to several pieces by Henry Purcell, one of which includes the opening notes of the modern tune, setting the words 'God Save the King'. Nineteenth-century scholars and commentators mention the widespread belief that an old Scots carol, 'Remember O Thou Man' was the source of the tune.
Answer:
who wrote the tune for god save the queen