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.

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


[Q]: When did the facebook messenger app come out?
[A]: When was the facebook messenger app originally developed as Facebook Chat?


[Q]: Who wrote the song where have all the flowers gone?
[A]:
Who wrote the melody for the song where have all the flowers gone?