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:
Who sang the theme song to scooby doo?
answer:
Who sang the theme song to the TV series Scooby Doo, Where Are You! from 1969-1970?


question:
Who sings the original seasons in the sun?
answer:

Who sings the original english version of seasons in the sun?