instruction:
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.
question:
Where are most of the us oil refineries located?
answer:
Where with respect to geographical features are most of the us oil refineries located?


question:
Who's performing the halftime show at super bowl 52?
answer:
Who's the featured performer performing the halftime show at super bowl 52?


question:
Who was responsible for bombing the spanish town of guernica?
answer:

Who was responsible for encouraging the bombing the spanish town of guernica?