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: What percentage of the us population has a phd?

Output: For people age 25-30, what percentage of the US population has a phd?


Input: Consider Input: When did the voting age change from 21 to 18?

Output: When did the debate begin to lower the voting age from 21 to 18?


Input: Consider Input: When was the first iron man comic released?


Output: When was the first appearance of iron man in a comic released?