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:
Who is the man with the burned face on game of thrones?
answer:
What is the name of the character who has the burned face on game of thrones?


question:
When do blair and the prince get married?
answer:
When do blair and the prince get married during Gossip Girl season 5?


question:
When did phone numbers change to 7 digits?
answer:

When did North American plan to change all phone numbers to 7 digits get accepted?