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 created the plan that became known as the american system?
answer:
Who  was the creation of the American System based on?


question:
Who's the starting quarterback for the saints?
answer:
Who's the starting quarterback for the saints in the 2017-2018 season?


question:
When was last time seattle seahawks won superbowl?
answer:

What date was last time seattle seahawks won superbowl?