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:
Doc martin how many episodes in season 7?
answer:
How many episodes in series 7 of Doc Martin?


question:
When did the facebook messenger app come out?
answer:
When was the facebook messenger app originally developed as Facebook Chat?


question:
When do you wear a white bow tie?
answer:

What form of occasion do you wear a white bow tie?