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.

Who demonstrated that a reflex could be conditioned to a neutral stimulus?
Who is best-known for demonstrating that a reflex could be conditioned to a neutral stimulus?

Where did let them eat cake come from?
What country did the phrase "Let them eat cake" originate?

When does brian come back to family guy?

In terms of plot, when does Brian come back to Family Guy?