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.

Input: Consider Input: When did the draft start for vietnam war?

Output: When did the first lottery for the draft start for the vietnam war?


Input: Consider Input: Raised line markers on the roadway and shoulder are used to define?

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


Input: Consider Input: When was first metro train started in world?


Output: When did the first underground metro railway open?