TASK DEFINITION: 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.
PROBLEM: When did the nfl start playing on christmas day?

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

PROBLEM: Who invented the system of latitudes and longitudes in 2nd century a.d?

SOLUTION: Who invented the system of latitudes and longitudes, measuring latitudes using the island of Rhodes in 2nd century a.d?

PROBLEM: Who played obi wan kenobi in star wars episode 3?

SOLUTION:
Who plays Obi Wan in Star Wars Episode 3?