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:
Who presented the first top of the pops?
answer:
Who presented the first ever top of the pops?


question:
When did the astros become an american league team?
answer:
What year did the astros become an american league team?


question:
When was the last time england got to the semi final of the world cup?
answer:

Prior to 2019, when was the last time england got to the semi final of the FIFA world cup?