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: Who is the father of emma on friends?

Output: Which character is the father of emma on friends?


Input: Consider Input: Who achieved a victory at the battle of marathon?

Output: What country achieved a victory at the battle of marathon?


Input: Consider Input: When did the french stop using the guillotine?


Output: When was the last execution in France using the guillotine?