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 do you play as in battlefront 2 campaign?
answer:
Who do you primarily play as in the 2017 battlefront 2 campaign?


question:
Who invented movable type and the machine to reproduce text?
answer:
Who invented the world's first movable type and machine to reproduce text?


question:
Where does the amazon river start and end?
answer:

Where does the amazon river start according to understanding before 2014?