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 is diving on in the commonwealth games?
answer:
When is diving on in the 2018 commonwealth games?


question:
Who is the president of south africa now?
answer:
Who is the president of south africa who first took office in 2009?


question:
Who was a at the beginning of pretty little liars?
answer:

Which character was a at the beginning of pretty little liars?