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 national world war ii memorial built?

Output: When did construction start on the national World War II memorial?


Input: Consider Input: Who has the best winning percentage in nfl history?

Output: What team has the best regular season winning percentage in NFL history?


Input: Consider Input: What came out first mr pibb or dr pepper?


Output: What came out for sale to the public first, mr pibb or dr pepper?