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 did a/c first appear in homes?
answer:
When did the first a/c unit appear in a home?

question:
Where is eurovision 2018 going to be held?
answer:
Where is the venue the eurovision 2018 going to be held?

question:
Who does the voice of alex in madagascar?
answer:
Who does the voice of Alex in Madagascar films and TV specials?