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 is eurovision 2018 going to be held?
answer:
Where is the venue the eurovision 2018 going to be held?


question:
When was the last burning at the stake in england?
answer:
When was the last burning alive at the stake in england?


question:
Which person or group brought polyphonic music into the christian church?
answer:

Who wrote the oldest known polyphonic setting of the mass attributable to one composer and brought it into the Christian church?