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.

Positive Example 1 -
Input: Lucifer how many episodes are in season 3?
Output: How many episodes of season 3 of Lucifer were there, including bonus episodes?

Positive Example 2 -
Input: What is the tallest ride at six flags over Texas?
Output: What is the tallest roller coaster at six flags over Texas 2001?

Negative Example 1 -
Input: Lucifer how many episodes are in season 3?
Output: How many episodes of season 4 of Lucifer were there, including bonus episodes?

Negative Example 2 -
Input: What is the tallest ride at six flags over texas?
Output: What is the tallest roller coaster at six flags over Tempe 2001?

Now complete the following example -
Input: Who has the most subscribers on youtube ever?
Output: 



Output:
Which channel has the most subscribers on youtube ever as of Dec 23, 2013?
Who has the most subscribers on youtube ever as of Dec 12, 2013?
Which channel has the most subscribers on youtube ever as of Dec 8, 2013?
Which person has the most subscribers on youtube ever as of Dec 23, 2013?
Which person has the most subscribers on youtube ever as of Dec 8, 2013?