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 is the father of emma on friends?
answer:
Which character is the father of emma on friends?


question:
When did the draft start for vietnam war?
answer:
When did the first lottery for the draft start for the vietnam war?


question:
When was the star wars theme song composed?
answer:

When was the Star Wars theme song, "Star Wars (Main Title)" recorded?