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.

[EX Q]: Who won the 2017 british open golf tournament?
[EX A]: Which person won the 2017 british open golf tournament?

[EX Q]: When did the nfl start playing on christmas day?
[EX A]: When did the nfl first start playing on christmas day?

[EX Q]: Part of a bone that forms an angle with the main body of the bone?
[EX A]:
Part of a bone that typically forms an obtuse angle with the main body of the bone?