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: Who's won the most fa cup's?

SOLUTION: What team won the most fa cup's?

PROBLEM: Another name of x axis and y axis?

SOLUTION: Another name of x axis?

PROBLEM: Who has the most subscribers on youtube ever?

SOLUTION:
Which channel has the most subscribers on youtube ever as of Dec 23, 2013?