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.

Q: When did britain give hong kong to china?

A: At what time did britain give hong kong to china?
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Q: Who played the other twin in parent trap?

A: Who played the part of the twins in parent trap(1961) ?
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Q: When did the concept of sustainable development come into existence?

A:
When is it widely accepted that the modern concept of sustainable development came into existence?
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