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 do they find the prison in walking dead?
answer:
What season do they find the prison in walking dead?


question:
When did the zulu arrive in south africa?
answer:
When did the zulu people arrive in south africa?


question:
Who played burt in i can only imagine?
answer:

Who played Bart Millard in I Can Only Imagine?