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.

When did the facebook messenger app come out?
When was the facebook messenger app originally developed as Facebook Chat?

Who has won the most soccer world cups?
Which country has won the most soccer world cups?

What book is the new season of game of thrones?

What book is the the 7th season of game of thrones, released in 2017?