TASK DEFINITION: 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.
PROBLEM: When did muslim armies invade syria and iraq?

SOLUTION: When did Muslims led by general Khalid ibn al-Walid invade what is now Iraq?

PROBLEM: Who was looking for a heart in the wizard of oz?

SOLUTION: Who is the character that was looking for a heart in the wizard of oz?

PROBLEM: Who made sitting on the dock of the bay?

SOLUTION:
Who was the songwriter of  the original "(Sittin' On) The Dock of the Bay"?