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.

Input: Consider Input: When was the cathedral of santiago de compostela built?

Output: When did construction start on the cathedral of santiago de compostela?


Input: Consider Input: Which channel in youtube has the most subscribers?

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


Input: Consider Input: When does tokyo ghoul re ep 3 come out?


Output: When does Tokyo Ghoul re, Season 1 episode 3 come out?