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.
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Question: What was the first year of the nissan gtr?

Answer: What year was the Nissan GT-R first produced?


Question: When did the first episode of phineas and ferb come out?

Answer: When did the first one-episode preview of phineas and ferb come out?


Question: When did they stop making silver kennedy half dollars?

Answer:
When did they stop making almost fully silver Kennedy half dollars?