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.

Ex Input:
When did the nfl start playing on christmas day?

Ex Output:
When did the nfl first start playing on christmas day?


Ex Input:
Whats the world record for running a mile?

Ex Output:
Whats the world record for men for running a mile after 1999?


Ex Input:
What is the largest denomination of us currency?

Ex Output:

What was the largest denomination of US currency in the form of a gold certificate?