TASK DEFINITION: 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.
PROBLEM: When did the afghanistan war start and end?

SOLUTION: When did the afghanistan war first phase start?

PROBLEM: When is harry potter and cursed child coming out?

SOLUTION: When is harry potter and cursed child preview at Palace Theatre, London coming out?

PROBLEM: Who has the mind stone in infinity war?

SOLUTION:
Who is the character who has the mind stone in his head in infinity war?