instruction:
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.
question:
What is the upper most layer of soil?
answer:
What is the upper most layer of soil called?


question:
Highest points scored in nba in one game?
answer:
What is the highest number of points scored in the NBA by one person in one game?


question:
When did the old pound coin come into circulation?
answer:

When did the old original pound coin come into circulation?