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 sang the theme song to petticoat junction?

SOLUTION: Who sang the theme song to petticoat junction used on the original show?

PROBLEM: Model of the solar system that places earth in the center?

SOLUTION: Whose model of the solar system places Earth in the center?

PROBLEM: When was the iphone 6 released in canada?

SOLUTION:
When was iPhone 6 first released in Canada?|When was iPhone 6 Plus first released in Canada?