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 does series 11 of big bang theory start?

SOLUTION: When does series 11 of big bang theory start airing?

PROBLEM: When does major league baseball start the regular season?

SOLUTION: When does the 2017 MLB regular season start?

PROBLEM: When did the earth and solar system form?

SOLUTION:
When did the Solar System form?