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: Where are most of the us oil refineries located?

SOLUTION: Where with respect to geographical features are most of the us oil refineries located?

PROBLEM: Where did let them eat cake come from?

SOLUTION: What country did the phrase "Let them eat cake" originate?

PROBLEM: When did they stop building on the winchester house?

SOLUTION:
When did they stop from-the-ground-up building on the winchester house?