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 was daylight saving introduced in new zealand?
answer:
When was daylight saving first introduced in new zealand?


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:
What are the hormones produced by the kidney?
answer:

What are the erythropoietin hormones produced by the kidney?