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.

[EX Q]: The basic ratio on which the notation of rhythm is built is?
[EX A]: The basic ratio on which the modern notation of rhythm is built is? 
 2:1

[EX Q]: Who was the starting quarterback for the vikings?
[EX A]: Who was the starting quarterback for the Vikings in 2017? 
 Case Keenum

[EX Q]: When did the battle of britain begin and end?
[EX A]:
When did the battle of britain begin? 
 10 July 1940