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 sang a crazy little thing called love?
answer:
What band sang a crazy little thing called love in 1979?


question:
Where does the umbilical vein enter the circulation of the fetus?
answer:
Where does less than a third of the blood from the umbilical vein enter the circulation of the fetus?


question:
Who wrote a diary about the great fire of london?
answer:

Who wrote the more well known diary about the great fire of london?