In this task, you're given an ambiguous question (which can be answered in more than one way). Your task is to write a question that clarifies the given question in such a way that the generated question has one unique answer.

[Q]: Who created the plan that became known as the american system?
[A]: Who  was the creation of the American System based on?


[Q]: Who sang a crazy little thing called love?
[A]: What band sang a crazy little thing called love in 1979?


[Q]: Who sings i wanna be a billionaire?
[A]:
Who sings the song "Billionaire"?