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 was responsible for keeping british ships out of the waterways off the coast of virginia?
answer:
Who is the group that was responsible for keeping british ships out of the waterways off the coast of virginia?


question:
When did the last of the mohicans take place?
answer:
When did publishing of did last of the mohicans novel take place?


question:
When did compulsory national service end in uk?
answer:

When did compulsory national service calls end for men in uk?