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.
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Question: When does series 11 of big bang theory start?

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


Question: When did sound become a regular part of the motion picture viewing experience?

Answer: When did sound become introduced as part of the motion picture viewing experience?


Question: Who played regina in once upon a time?

Answer:
Who played Young Regina in Once Upon a Time?