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.

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

Who is chief election commissioner of india now?
Who is Chief election Commissioner of India in 2017?

When did spain give the united states full control of the philippines?

When did spain give the united states full control of the philippines by surrendering and signing a protocol of peace?