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: Which channel in youtube has the most subscribers?

SOLUTION: What was the Youtube channel with the most subscribers as of December 23, 2013?

PROBLEM: In which year india's capital shifted from calcutta to delhi?

SOLUTION: Which year was it announced that India's capital would shift from Calcutta to Delhi?

PROBLEM: How many cricket stadium are there in india?

SOLUTION:
How many total cricket stadium are there in india?