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:
When did britain give hong kong to china?
answer:
At what time did britain give hong kong to china?


question:
When was the first superman comic book published?
answer:
When was the first comic book featuring Superman published?


question:
Who plays carrie on little house on the prairie?
answer:

Who plays carrie on the musical little house on the prairie?