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: Where are the blood vessels of the skin located?

SOLUTION: In which layer of skin are the blood vessels of the skin located?

PROBLEM: Who sings the song spirit in the sky?

SOLUTION: Who sings the original song "Spirit in the Sky" from 1969?

PROBLEM: When did old £5 go out of circulation?

SOLUTION:
When did the White 1793 £5 go out of circulation?