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: When did the last season of one tree hill air?

Answer: When did the last season of one tree hill begin to air?


Question: Who has won the european cup the most?

Answer: What club has won the european cup the most?


Question: When did little house on the prarie come out?

Answer:
When did the novel little house on the prarie come out?