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:
Raised line markers on the roadway and shoulder are used to define?
answer:
Raised line markers on the roadway and shoulder are, parallel to drive directed are used to define?


question:
What can be used as proof of identity?
answer:
What can be used as proof of identity in Australia for those without a driver's licence?


question:
When do the new episodes of the flash start?
answer:

When do the new episodes of the flash start in 2017?