In this task, you're given an ambiguous question (which can be answered in more than one way). Your task is to provide one question which clarifies the input question and it has one unique answer, and also provide an answer to the generated question. Generated question and answer should be separated with a new line.

[Q]: What is the minimum wage in the united states today?
[A]: What is the federal minimum wage in the united states in 2019? 
 $7.25 per hour


[Q]: Where does the savannah river begin and end?
[A]: Where does the savannah river begin? 
 confluence of the Tugaloo River and the Seneca River


[Q]: When was the earliest use we know about for concrete?
[A]:
When was the earliest use we know about for regular concrete? 
 700 BC