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:
In which year india's capital shifted from calcutta to delhi?
answer:
Which year was it announced that India's capital would shift from Calcutta to Delhi?


question:
Who does belgium play in round of 16?
answer:

Who does belgium play in round of 16 at the 2014 FIFA World cup?