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.

[EX Q]: Who does lady gaga play in american horror story?
[EX A]: Who does Lady Gaga play in American Horror Story: Hotel?

[EX Q]: When did the facebook messenger app come out?
[EX A]: When was the facebook messenger app originally developed as Facebook Chat?

[EX Q]: When did army air corps become air force?
[EX A]:
When did US army air corps become air force?