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 was formula one world champion four times in a row from 2010 to 2013?
answer:
What driver was formula one world champion four times in a row from 2010 to 2013?


question:
The back of the leg is called what?
answer:
The back of the lower leg is called what?


question:
When did the original green lantern come out?
answer:

When did the original green lantern comic book come out?