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: Who has won the most soccer world cups?

SOLUTION: Which country has won the most soccer world cups?

PROBLEM: In which language is the indian national anthem?

SOLUTION: In which language is the indian national anthem originally writeen?

PROBLEM: When did the facebook messenger app come out?

SOLUTION:
When was the facebook messenger app originally developed as Facebook Chat?