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 muslim armies invade syria and iraq?
answer:
When did Muslims led by general Khalid ibn al-Walid invade what is now Iraq?


question:
Where does vanilla come from in the world?
answer:
Which country is the top vanilla producer in the world?


question:
Who is broadcasting the super bowl in 2019?
answer:

What network broadcast the super bowl in 2019?